Feature:1. Bicycle A / Bicycle B selectable, buttons control for easy operation.2. Multifunctional, includes all vital functions for novices and pros alike.3. LCD display with back light allows you to read riding data easily and clearly during night trip.4. Durable and waterproof for use in all conditions.5. Easy installation, no tools required.Specification:This bike computer is an ideal companion for your riding.With multiple functions, 2.8in LCD backlight and rechargeable. Features:Bicycle A / Bicycle B selectable, buttons control for easy operation. Multifunctional, includes all vital functions for novices and pros alike.LCD display with back light allows you to read riding data easily and clearly during night trip.Durable and waterproof for use in all conditions.Easy installation, no tools required.Specifications:Color: BlackMaterial: PlasticBattery: Rechargeable 250mah lithium battery Style: WirelessWatertight: IP4Item Size: 9*5.3*2.2cm / 3.5*2.1*0.9inWeight: 53g / 1.9ozPackage Size: 10*13*5cm / 3.9*5.1*2.0in Package Weight: 120g / 4.2ozPackage list:1 * Bike Computer1 * Bracket1 * Sensor1 * Magnet1 * Type-c USB Cable1 * ManualPackage List:1 * Bike Computer1 * Bracket1 * Sensor1 * Magnet1 * Type-c USB Cable1 * Manual