brand new and high quality Features: Advanced Bluetooth-compatible chip and circuit design, supporting most Bluetooth-compatible devices. Excellent for outdoor sport and exercise and travel and so on Support line-in audio input, connected to Bluetooth-compatible speaker through output devices, for example mp3/mp4, tablet, mobile phone etc. Transmission distance can be up to 10m, and it's more compact, portable and convenient to carry. Wireless portable mini Bluetooth-compatible stereo speaker system, hands-free call. Specifications: Colour: Black Material: ABS Play mode: Bluetooth-compatible connection, TF card / U disk playback, FM radio Blue Yan: 4.1 Rated power: 5W Frequency response range: 60Hz-15KHz Speaker diameter: 4 inches LED light: with Signal to noise ratio: 70db Extended storage: 32GB Effective distance: 10M (in case of barrier-free) Battery capacity: 1200mah (built-in) Use time: 3 hours or so Charging interface: MICRO USB charging Button functions: On/Off, Up/Down, Pause/Play, Mode Switch Product size: 13x10.5x20cm Notes: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 1X Bluetooth-compatible speaker, 1X USB cable