sonar wirelles -70m

2) Sonar & Radio Depth Capability: 1-130ft/0.3-40m Wireless Operating Range: 168ft/70m Sonar Frequency: 115KHz Sonar Beam Angle: 80deg @ -10dB Radio Frequency: 433.9 MHz Sonar Alarms: Fish /Shallow 3)Technical and casing Built-in memory stores sonar settings when the unit is turned off Temperature: Air temperature sensor included in main unit Operational Temperature: From -10C to 50C (14F to 122F) Sensor could shut down when the sonar sensor is out of water Units: F/ft f/m C/ft c/m Unit dimensions: 138mm x 69mm x 32mm 4)Power Power Supply: 4XAAA Alkaline batteries Sensor Battery Life: 550 Hours of in-the-water usage, Sensor battery can be replaced. Handheld Battery Life: 45Hours continuous use Handheld Power Off Automatically in 10 minutes without any using 2. Features 1)Switchable fish identification mode 2)Sensitivity: 0-100% adjustable range 3)Chart Speed: 0-100% adjustable 4)Multi Level Depth Range 5)"Freeze" screen at any time 6)Big/small fish identification 7)Fresh/salt water environment 8)Ture changing water bottom graph