Liger XS400 Bluetooth 4.1 Stereo Bluetooth Headset with Digital Noise Reduction for all iOS, Android and Bluetooth Devices COMFORTABLE and PERFECT FIT: Light weight, comes with 180 degree rotatable ear hook and painless mobile epoxy earmuffs, make it easy to wear and offer you a more comfortable wearing experience. STRONG and GREAT COMPATIBILITY: This headset is compatible with cell phone, tablet, MP3, and almost all of device with Bluetooth function. It can play stream music and audio from almost all of device with Bluetooth function and giving you extraordinary audio experience. TWIN-LINK and FAST CONNECTION: This headset can pair with 2 smart phones simultaneously; Based on Bluetooth 4.1 and CSR8610 high-end chip from CSR Plc, it can fast and easily pair with your smart-phone. SOUND QUALITY ABOVE STANDARD: It uses echo cancellation and noise suppression technology to help give you a clearer sound which works very well. Both sides of the conversation sound great without any static or background noise. LONG TALKING and STANDBY TIME: Long standby time up to 150 hours, and long working time up to 7 hours with every about 2 hours charging.