MT0558S Features Fashionable appearance works with stereo sound effect Built-in microphone， supports hands-free calling Supports Bluetooth technology for music play and clear hands-free conversation Can play music from an external TF card Compact size for ease of carrying Supports FM radio  General Specs Brand & Model X-007 Type Bluetooth speaker Music Format MP3 Power Output 3W Battery Capacity 600mAh Charging Voltage 5V Charging Time 2.5 hours Product Details (without package and accessories) Dimensions 50 x 50 x 50 mm Package Details Weight: 169.06 g Size: 7.5*5.5*5.5 cm