Bicycle Small Parts IGPSPORT SPD61 ANT+ BT Speed Sensor Bicycle Computer Stopwatch Bike Accessories Easily collect real time speed and cadence data to help optimize your cycling performance. Features: SHOCKPROOF: Resistant to 1.5m fall naturally. WIRELESS: BT4.0 / ANT+ wireless transmission protocol. LONG BATTERY LIFE: Normal use for one year (an hour per day). IPX7 RATING: Allows for riding in rainy days. COMPATIBLE DEVICES: IGS2OP, IGS30, IGS216, IGS60; EDGE500/510/520/800/810/1000. Easily collect real time speed and cadence data to help optimize your cycling performance. Specification: Model: SPD61 Color: Black Material: ABS IP Rating: IPX7 Power: 1 * 3V / 120mAh CR2032 (Included) Wireless Transmission: ANT+ wireless communication protocol (more than 3.0m) Item Size: 37 * 36 * 10mm / 1.5 * 1.4 * 0.4in Net Weight: 9.5g / 0.3oz (with battery) Package Size: 102 * 81 * 26mm / 4.0 * 3.2 * 1.0in Package Weight: 36g / 1.28oz Package List: 1 * Speed Sensor 1 * Silicone Pad 1 * CR2032 Battery 1 * Strap 1 * User Manual