200 hours of use time, 450 days of standby time. Remains stationary when in sleep mode. Easy to install with a flexible rubber band, allowing secure attachment to your bicycle without the need for magnets or calibration. Features Bluetooth 4.0 and ANT+ multi-protocol support, compatible with various devices and applications that collect speed data via Bluetooth or ANT+. Waterproof design with IPX7 rating. Powered by a CR2032 battery with a rated voltage of 3.0V. Measures speed within a range of 0-70km/h. Compatible with cycling apps, bike trainers, sport watches, and more. Color: black. Material: ABS. Dimensions: 38x28x15mm. Package includes: 1 x Speed Sensor, 1 x Battery, 2 x Rubber Band. Note: Lighting and display differences may cause slight color variation between the image and the actual item. Measurement error allowance is +/- 1-3cm.