Wireless, castable Deeper Smart Sonar PRO+ is the best of its series.

It uses Wi-Fi connection to transfer more accurate data to your smartphone or tablet. Deeper Smart Sonar PRO+ contains a highly accurate internal GPS receiver that enables device to create bathymetric maps while fishing onshore or off. This makes Deeper Smart Sonar PRO+ the only available castable echo sounder that allows you to access accurate feature- and fish-finding data that was previously available only on the consoles of expensive fishing boats.

Features
Size: 2.5/ 6.5cm diameter
Compatibility: iOS 8.0 and Android 4.0
Construction: ABS
Weight: 3.5oz / 100g
Connection: Wireless Wi-Fi connection
Depth Range: 260 ft (80 m)
Wide angle – 4.3 ft (1.3 m)
Narrow angle – 2 ft (0.5 m)
Water temperature sensor
Temperature unit: Celsius / Fahrenheit
Operational Temperature: -20C to 40C / -4F to 104F
Lithium Polymer Battery
3.7V Rechargeable
Lasts for 6 hours of nonstop usage
Takes 2 hours to fully charge
Power Adapter: Compatible with 110V / 240V. Micro USB
Sonar type: Dual Beam
Frequency: 290 kHz (15) / 90 kHz (55)
Colour: Black