Audio Components 411 Specification Paremeters Wireless Version: 4.2+EDR Working Distance: up to 10 meters Output Power: 3W Play time: 3hours Battery capacity: 500mAh Charging Voltage: 5V USB port Features: 1.Speaker phone Function: Support speaker phone, built-in microphone to bring clear calls for you, its very perfect either with single or multiplayer for phone calls or video chat. 2.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 overweight bass effect. 3.Lasting power, long battery life: Two power modes, built-in lithium secondary medium volume with 2-3 hours of playback capacity, suitable for any occasion. 4.Simple and easy to operate: Through 10000 to touch test, wearnon-slip, resistance to high temperature, long service life.