Power supply: Main unit power: 4 x AAA alkaline batteries
Sensor full power: Lithium rechargeable batteryIt can be used for over 7 hours of full charge.
Product Specifications:
1) Display Size: 2.2" Image Count: 128Vx64H
2)Backlight: On/Off White LED
3) Depth detection range: 45m(135ft)
4) Main unit power: 4 x AAA alkaline batteries
5) Sensor Power Supply: 3.7V lithium ion battery (can be used for over 7 hours of full charge).
6) Sensor Dimensions: Diameter 2.6 inches (67 mm) Globe Weight: 2.5 oz (70 g).
7) Sensor transmitting angle: 90 degrees
8) Waterproof level: IPX4 (spray waterproof).
9) Operating Temperature: -10°C to 50°C (14°F to 122°F)