This USB 2.0 cable connects your smart watch to your computer's USB port for charging. Or you can connect to the USB Power Adapter for convenient charging from a wall outlet. FAST CHAEGE & STABLE PERFORMANCE. OVER-VOLTAGE & OVER-CURRENT PROTECTION Cable Length: 3.3 ft./100 cm Charge Time: 60 Minutes Input: 5V / 1000-1500 mAh Ouput: 5V/ 1000 mAh Chip Protective voltage / Current : 6V / 200mA Tips to help you protect your smart watch better: Using the charging cable with built-in chip, can effectively prolong the service life of watch. Limit recharging time to 80 minutes is appropriate. Charging your watch before the battery runs down. Don't use the cell phone charger, please connected to USB Power Source on PC, Mac, Laptop or Notebook for more stable voltage. Material:plastic colour: black Package Contents: 1 x Charger for Polar V800 Only the above package content, other products are not included. Note: Light shooting 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.