Specification:1. Size: 68x68x50 mm2. Depth: 0.6-36M (2.5-120FT)3. Radio frequency: 2.4GHZ4. Bluetooth distance: 30M5. Sonar frequency: 125kHZ6. Built-in battery: 1000mAh lithium battery7. Battery life: 10 hours8. Working temperature: -10-60 degrees Celsius9. Sonar radiation angle: 90 degrees10. Power supply: DC 10V-18V11. Depth range: 0.6M-30MFeatures:1. Fish size, bottom outline, water depth, temperature display2. Sonar fishing recognition technology3. Apps on iOS or Android4. Lightweight, portable and practical5. Wide range of applicationsShipping list:- 1 x wireless remote sonar sensor- 1 x manual- 1 x charging cable

http://olla.gr/fish-finder-wireless-mobile-phone-sonar-fish-finder-app-underwater-fish-finder-fishing-fishing-gear-red/