Features: 2.0" display screen with backlight.Real time display helps track speed,distance,calories,date,time,and multiple datas instantly. 4 satellites positional systems ensure accurate position and trace. Built-in a 600mAh rechargeable lithium battery,about 20 hours batter life after 2-hours full charged. IPX6 water resistant allows for riding in rainy days. Easy to install onto the handlebar with the provided mount,rubber pad and rubber bands. Specification: Set: 1 / 2 (optional) Bike Computer: Model: G1 Material: Plastic Screen: 2.0" LED Battery: 600mAh Working time: Up to 20hrs Charging time: approx. 2hrs Waterproof Level: IPX6 Size: 59*55*22mm / 2.3*2.2*0.9in Weight: approx. 56g / 2.0oz Package size: 98*34*129mm / 3.9*1.3*5.1in Package weight: approx. 100g / 3.5oz (Set 1) Package List: 1* Bike Computer 1* User Manual 1* Charging Cable 1* Mount 1* Rubber Pad 4* Rubber Band (Set 2) Package List: 1* Bike Computer 1* User Manual 1* Charging Cable 1* Mount 1* Rubber Pad 4* Rubber Band 1* Mount Holder 1* Wrench 2* Screw 2* Washer