1. [Dynamic GPS Positioning]- This bike computer with higher sensitivity, higher accuracy, faster positioning. The GPS signal tracks your route, it display ride time, riding distance, total riding time, total riding mileage, clock, current altitude. 2. [IPX6 Waterproof and Large Battery Capacity]- Wireless and waterproof design. It can work anytime in the rain. 3. [Automatic Wireless Bike Computer]This cycling computer automatically enter sleep mode after 10 minutes of inactivity, it display your last cycling data when you turn it on. Color: Black Material: plastic Package Contents: 1 * Bike Computer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.