Main Feature: 100% Brand NewWater proof and lightweightWonderful gadget for traveling， best tool to keep fit Easy to install， easy to read LCD display， ideal companion for your bicycle Battey: 1pcs AG13 battery (included)Specification: Weight: 0.083 kg Package Size: 17.7 x 10 x 3.8 cmPackage: 1 x Cycle Computer 1 x Wheek Magnet1 x Universal Sensor Bracke 2 x Cable Ties1 x Plastic Screw1 x AG13 battery 1 x English User Manual