Portable,Music on the Go. Mini Sized Body with an Elegant Shape. Even it is small like an egg, but it equipped with a high-class passive radiator which delivers rich bass and deep lows. Fabulous small body blasts out unbelievable clear and loud sound. TF card playback supports common mainstream music format playback Specifications: Dimension: Dia1.83Inches* H1.52Inches Material: Steel/ Stainless steel/ ABS Drivers: 3W : 5.0 Transmission Distance: 30-40 ft Battery: Lithium- Polymer 500 mAh Charging Port: Micro USB Charging Time: 1-2 s Playback Time: UP to 6 s Packing list: 1 * Speaker Note: 1. Please allow 0?2cm 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.