Function: 1. Compact and Portable: Mini Bluetooth speaker, lightweight and simple, designed with a hand strap, convenient to carry, listen to music anytime. 2. Clear Sound: Wireless mini speaker built-in power, provides clear and large volume playback, strong loudness. 3. Multi-functional: Small subwoofer speaker with memory card, USB, FM function, to meet your needs for different usage scenarios. 4. Stable and Sensitive: Bluetooth speaker uses a 4.2 chip to provide a fast and stable connection, low power consumption, suitable for indoor or outdoor use. 5. Premium Material: This portable speaker is made of premium ABS plastic, fabric material, providing a delicate feel and a more fashionable appearance. Specification: Item Type: Mini BT Speaker Material: ABS plastic, fabric Main Function: BT, memory card, USB, FM BT Specification: BT 4.2 Power: 3W Battery Specification: 300mAh Playback Time: 2 hours Audio Channel Mode: Mono Playback Format: MP3, WMA, WAV Amplifier Specifications: 3W x 1 BT Distance: <10m/32.8ft Expansion Memory: 16G Frequency Response: 80Hz-20KHz SNR: ≧75dB Charging Parameters: 5V 0.3A. Package List: 1 x Mini BT Speaker 1 x Data Cable