This bike computer is a perfect device for your health management. It can show cycling speed, cadence, time and calories burnt data in phone app with BT technology.

Features:
WIRELESS TRANSMISSION: BT 4.0 technology, it can transmit data of cycling speed, cadence, time and calories burnt to your phone app.
WATER REPELLENCY: You can enjoy riding even in rainy days. 
LOW-POWER: BT 4.0 low power consumption, and powered by one CR2032 cell battery and can last about 500 hours.
COMPATIBLE APP: Compatible with the most popular cycling APPs on the market such as Wahoo Utility, MapMyFitness, MapMyRIDE, Myway Fit,Wahoo Fitness, Biky Coach and so on.
EASY INSTALLATION: Only need about 3 minutes without any tools.

Specification:
Material: ABS
Battery:1 * CR2032 (included)
Transmission Range:<3.0m（9.9ft）
Operating Temperature: -10°C～50°C(14°F～122°F)
Battery Life: Approx 500 hours
Size: 5.2 * 4.5 * 1.7in / 2.0 * 1.8 * 0.7in
Net Weight: 27g / 0.98oz
Package Size: 11.2 * 7.1 * 3.6cm / 4.4 * 2.8 * 1.4in
Package Weight: 54g / 1.93oz

Package List: 
1 * Bike Computer
2 * Cable Ties
1 * Crank Magnet
1 * Wheel Magnet
1 * User Manual