Made of , durable to use. Pretend you're running and have your WeChat program record your steps automatically. It also can be used as a mobile phone bracket with good view of screen, easy to take. Battery or USB charging to operate, easy to use. Perfect gift for your friends or family, a good craft ornament. Features: Made of , durable to use. Pretend you're running and have your WeChat program record your steps automatically. It also can be used as a mobile phone bracket with good view of screen, easy to take. Battery or USB charging to operate, easy to use. Perfect gift for your friends or family, a good craft ornament. Specification: Material: Metal & Plastic Weight: 354g/12.5oz Battery Model: 4*AA Battery (NOT included) Color: As pictures shown Size: 20*11*11cm/4.7*4.3*4.3inch Package List: 1 Set x Mobile Phone Wiggle Device 1 x USB Cable Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.