SUNDING SD-568C Wireless Bicycle Computer Waterproof Backlight Bike Cycling Speedometer Odometer
Features:

Cycling speed, mileage, time, single mileage, maximum speed, km/mile setting, average speed;

Waterproof function;

Specifications:
Model: SD-568C
Material: engineering plastic, electronic components
Colour: Black
Product size: 40 x 40 x 15mm/1.57 x 1.57 x 0.59"
Net weight: 28g
Gross weight: 83g
Power supply: 2 x CR2032 button batteries for the computer (battery not included)

Package Content:
1 x Bicycle Computer