EXTREME-MASTER SONAR S300 – 800kHz Fish Finder with Temperature Sensor | New for 2025
🔥 NEW! EXTREME-MASTER SONAR S300 – 6 beams (200-800 kHz), water temperature sensor, twice the accuracy of the S200! Compatible with EXTREME-ELRS and cloud console. Coming soon!
Description
📊 EXTREME-MASTER SONAR S300 – New generation fish finders for bait boats | NEW FOR 2025
EXTREME-MASTER SONAR S300 is the latest, advanced fish finder designed for professional carp anglers. 6 beams (200-800 kHz), water temperature sensor, echogram + GPS recording, EXTREME ONE bait boat app (iOS + Android).
🔥 WHAT’S NEW IN S300 vs S200?
⚡ 2x MORE POWER AND ACCURACY!
- ✅ 6 beams (200-800 kHz) vs 5 beams (200-715 kHz) in S200
- ✅ 800 kHz – 2x better accuracy than 715 kHz in S200!
- ✅ Water temperature sensor – NEW! Not available in S200
- ✅ 2x higher transmit power – better image at greater depths
- ✅ Even more precise carp detection – see details S200 couldn’t show
- ✅ All S200 features + hardware improvements
🌡️ NEW: Water Temperature Sensor
The S300 is the first in the EXTREME-MASTER series to feature a built-in water temperature sensor:
- 📊 Real-time measurement
- 📈 Temperature recording along with echogram
- 🎯 Correlation analysis: temperature ↔ carp activity
- 💾 Temperature history in Microsoft cloud
Why is this important? Carp are very sensitive to water temperature. Knowing where and at what temperature they were active allows you to plan your next trips!
⭐ Why EXTREME-MASTER SONAR S300?
- ✅ 6 beams (200-800 kHz) – best bottom imaging on the market
- ✅ Temperature sensor – analyze carp activity
- ✅ Echogram + GPS recording – analyze at home, return to your hotspot
- ✅ Dual mode with EXTREME-PILOT – unique! Record bait boat route + echogram
- ✅ 9 color themes – Green Ufo, Downvision, Rainbow, Raywave…
- ✅ Adjustable beam angle – 45°, 35°, 25°, 15°, 9°
- ✅ Depth up to 60m – greater than S200 (40m)
- ✅ Range 200-300m+ – from shore to tablet/phone
📡 EXTREME-ELRS – Standalone Transmitter (Optional)
The S300 is compatible with the latest EXTREME-ELRS transmitter:
- 📡 Drone technology – proven in aviation
- ✅ Reliability and stability – interference-free
- ✅ Extended range – further than standard WiFi
- ✅ LBT (Listen Before Talk) 100mW – compliant with PL regulations
- ✅ Standalone – independent module
What is LBT? The transmitter “listens” before transmitting – if it detects interference on the frequency, it automatically switches to a clear one. This ensures zero connection issues!
🎮 Control Console with Microsoft Cloud (Optional)
A dedicated control console that works with the S300 is also available:
- 🎮 Bait boat control – no phone/tablet needed
- 📍 GPS waypoint saving – directly on the console
- 📊 Echogram recording – all in one place
- ☁️ Microsoft cloud sync – access from any device
- 🔋 Long operating time – all day on the water
How it works?
- You survey the spot from the console
- You save echograms + GPS waypoints
- You go home
- You open the EXTREME ONE app on your phone/tablet
- Everything is already synced via Microsoft cloud!
- You analyze at home at your leisure
- You return to the water and immediately deploy to the saved spots
🔄 UNIQUE FEATURE: Dual mode with autopilot!
This is a feature NO competitor has!
If you have an EXTREME-PILOT bait boat autopilot (GPS), you can record the bait boat route + echogram in real-time:
- 🚤 Autopilot follows the route – You monitor the echogram
- 📹 Echogram + GPS + temperature recording – the entire route saved
- 🏠 Analysis at home – calmly review echograms on your sofa
- 🎯 Pinpoint the spot – precisely indicate it on the echogram
- 🚀 Autopilot to waypoint – send your bait boat exactly there
- 💾 Save marker – remember the hotspot forever
- ☁️ Cloud sync – access routes and echograms from any device
Competitors (Deeper, Garmin Striker): Don’t have this feature! You have to manually remember where you saw fish.
📐 6 Beams – Adjustable Beam Angle
The EXTREME-MASTER SONAR S300 has 6 different beam angles to choose from (S200 had 5):
| Beam Angle | Frequency | Application |
|---|---|---|
| 45° | 200 kHz | Wide scanning area – fast passes |
| 35° | 290 kHz | Balance width/precision – universal |
| 25° | 455 kHz | Medium precision – for most waters |
| 15° | 600 kHz | High precision – structure details |
| 9° | 715 kHz | Highest S200 precision |
| 7° | 800 kHz | NEW! Ultra-precision – deep waters, carp in structure |
800 kHz – Why?
At 800 kHz, you get 2x better resolution than at 715 kHz. You see:
– Individual carp in a school (not just a “blob”)
– Bottom structure in the finest detail
– Carp in dense vegetation (where 715 kHz only shows “green”)
🎨 9 Color Themes
Customize the echogram colors to your preferences:
- 🟢 Green Ufo – classic green
- 🔵 Downvision – like Lowrance DownScan
- 🌈 Rainbow – rainbow spectrum
- 🔵 Blue Navy – deep navy blue
- ☢️ X-Ray – black-and-white contrast
- 🟤 Sepia – vintage brown
- 🌊 Deep – dark for deep waters
- 🟣 Vexi – purple
- ✨ Raywave – modern gradient
- 🎨 Custom color – create a personalized scheme
🔧 Technical Specifications
| Parameter | EXTREME-MASTER S300 | EXTREME-MASTER S200 |
|---|---|---|
| Frequency | ✅ 200-800 kHz (6 beams!) | 200-715 kHz (5 beams) |
| Temperature sensor | ✅ YES – NEW! | ❌ NO |
| Transmit power | ✅ 2x higher | Standard |
| Scanning depth | ✅ Up to 60 meters | Up to 40 meters |
| Transmission range | ✅ 200-300m | ✅ 200-300m |
| Beam angles | ✅ 45°, 35°, 25°, 15°, 9°, 7° (NEW!) | 45°, 35°, 25°, 15°, 9° |
| Color themes | 9 + custom | 9 + custom |
| Echogram recording | YES + GPS + temperature | YES + GPS |
| Dual screen mode | Map + echogram simultaneously | Map + echogram simultaneously |
| App | EXTREME ONE (iOS + Android) | EXTREME ONE (iOS + Android) |
| Autopilot compatibility | EXTREME-PILOT (dual mode) | EXTREME-PILOT (dual mode) |
| ELRS compatibility | ✅ YES (optional) | ✅ YES (optional) |
| Control console | ✅ YES (optional) | ✅ YES (optional) |
| Warranty | 24 months | 24 months |
⚙️ Installation by Authorized Service
IMPORTANT! The EXTREME-MASTER SONAR S300 is installed by authorized distributors:
- 🔧 You come with: Your bait boat
- 📦 Service installs the S300 fish finder in your boat
- 🔌 Optional: EXTREME-ELRS + control console
- ✅ You get: A ready-to-use bait boat with the latest fish finder + EXTREME ONE app
Authorized Distributors:
- 🔹 Śląskie: Sylvi-Boat (505 745 958), Masterboat (531 290 274, 793 777 812)
- 🔹 Wielkopolskie: MateoNaHaczyku (698 967 654)
- 🔹 Małopolskie: Hybrid-Boat (601 199 739)
📦 What You Get?
- ✅ EXTREME-MASTER SONAR S300 Fish Finder
- ✅ User Manual PL
- ✅ Access to EXTREME ONE app (iOS + Android)
- ✅ Technical support (email + phone)
- ✅ 24-month warranty
- ✅ Free updates
🆚 Comparison: S300 vs S200 vs Competition
| Feature | EXTREME S300 | EXTREME S200 | Deeper CHIRP+ 2 |
|---|---|---|---|
| Frequency | ✅ 200-800 kHz (6 beams) | 200-715 kHz (5 beams) | ⚠️ 290-675 kHz (3 beams) |
| Temperature sensor | ✅ YES | ❌ NO | ✅ YES |
| Transmit power | ✅ 2x higher | Standard | Standard |
| Echogram recording | ✅ YES + GPS + temp | ✅ YES + GPS | ✅ YES (no GPS) |
| Dual mode with autopilot | ✅ YES (UNIQUE!) | ✅ YES (UNIQUE!) | ❌ NO |
| Depth | ✅ 60m | 50m | ✅ 100m |
| Range | ✅ 300m+ | 200-300m | ⚠️ 100m |
| ELRS standalone | ✅ YES (optional) | ✅ YES (optional) | ❌ NO |
| Control console | ✅ YES (optional) | ✅ YES (optional) | ❌ NO |
❓ Frequently Asked Questions (FAQ)
What are the differences between S300 and S200?
Key differences:
- ✅ 800 kHz vs 715 kHz – 2x better accuracy
- ✅ 6 beams vs 5 – additional 7° beam at 800 kHz
- ✅ Temperature sensor – S300 has it, S200 does not
- ✅ 2x higher power – better image at depths
- ✅ 60m vs 40m – greater scanning depth
- ✅ ELRS and console compatibility – S300 only
Can I use it without an autopilot?
YES! The fish finder works independently. The EXTREME-PILOT autopilot, ELRS transmitter, and console are optional extras.
Does it record echograms?
YES + GPS + temperature! S300 records:
– Echogram (bottom image)
– GPS position
– Water temperature at a given location
You can return to the exact spot where you saw fish and check at what temperature they were active!
What is the range?
300m+ from shore to tablet/phone (direct WiFi). Even further with the ELRS transmitter!
When is the launch and price?
Official launch will be announced soon.
Price: Will be announced at the official launch.
Follow our social media and sign up for our newsletter to be the first to know!
🎯 Who is EXTREME-MASTER SONAR S300 for?
✅ Recommended if:
- You’re looking for the best fish finder on the market – no compromises
- You want 800 kHz – 2x better accuracy than S200
- You need a temperature sensor – for carp activity analysis
- You plan to use a console + ELRS – for standalone control
- You have an EXTREME-PILOT – dual mode is a must-have
- You fish using the spot exploration method – mapping + analysis
❌ NOT recommended if:
- S200 is enough for you – if you don’t need 800 kHz and a temperature sensor
- You don’t have a bait boat – this fish finder is dedicated to bait boats
📞 Technical Support
🇵🇱 Polish manufacturer – EXTREME-BaitBoat.pl
📧 Email: piotr.kaczmarczyk@extreme-baitboat.pl
📱 Phone: +48 695 056 242 (Mon-Fri 3:00 PM – 6:00 PM)
⏱️ Warranty: 24 months
🔄 Updates: Free
🛠️ Service: Repairs in Poland
🚀 NEW FOR 2025 – Be the first!
EXTREME-MASTER SONAR S300 – a new generation of fish finders for professionals!
📢 Price and launch date: Coming soon!
📱 Sign up for the newsletter: Be the first to know!
Polish product. PL Technical support. Compatible with EXTREME-PILOT autopilot, ELRS transmitter, and control console.
🎬 Watch the S300 presentation video on our YouTube channel!
