All Device Compatible Bluetooth/USB speaker SR-525 is stylish and has an elegant Design. This portable Compact Size multimedia speaker system comes with active Amplifier and Elegant Sound quality It has distinct tone levels, small sized Premium Design, easy to carry along anywhere you travel. Supports Speakerphone, Built in Microphone, to bring clear call for you,it is perfect either with single or multiplayer for phone call or video chat.Simple and easy to operate key design through 10000 to touch test, wear non-slip,temperature,long service life.Pure music, perfect to enjoy, high fidelity sound, stereo speakers, built-in resonance radiator device, equipped with high efficiency power amplifier, super low frequency dynamic bass-rich,flexible, achieve a more shocking extremely super bass effect. lasting power long battery life two power modes, built-in lithium secondary medium volume with 5 hours of Playback Capability, Suitable for any Occasion.