Features:1. This device can swing your mobile phone automatically to increase the step counts2. and unique mobile phone pedometer, powered by USB charge or battery(not included)3. Suitable for mobile phone size below 6.2 inch4. Automatic Stepper, Easy to Use, Walking Swing, DurableSpecifications:Condition: Type: Phone Pedometer Supply: USB Charge/4 x AA Batteries (Not Included)Colour: BlackMaterial: Aluminum alloyPackage Contents:1 * Mobile Phone Pedometer1 * USB CableOnly the above package content, other products are not included.Note: Light 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.