Double phone wiggler for mobile devices with auto shakeFeatures: 1. Automatic Steps Earning Device: Recommended for those who want to increase the number of walks With this phone swing device, pretend you are running, it record steps automatically. 2. Fit for Phone Under 6.4inch: Suitable for most 6.4inch phone or less, apply to most of the APP like smart bracelet, Wechat movement, etc. It can also be used as a mobile phone holder. 3. No Harm and No Noise: High quality metal bracket is smooth and burr-free, won't scratches hand and mobile phone, low noise, won't affect sleeping when shaking at night. 4. For Two Phone: The front and back of this swing device can hold mobile phones. 5. Easy to Install and Use: USB charging or 4 AA batteries not included for power supply. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement. 2.The battery is not included. 3. Do not insert the battery when USB charging. Specification: Type: Phone Swing Device Material: metal plastic Power supply: USB charging or batteries 4 AA batteries need to be prepared yourself. Applicable phone: Recommended for mobile phones within 6.4 inches. Duals phone version: Both the front and the back can hold mobile phones Package List: 1 x Phone Swing Device 1 x charging cable