NEWZOR Business Head Wearing Stereo Bluetooth Headset Noise Cancelling Headphone With MIC Hand-free Wireless Headsets Headband Earphone for Call Center/ Trucker/ Office Staff Adjustable Headset Band: The headset can be weared around, adjusted according to the size of wearers head type, suitable for different people, more convenient to use. Bluetooth Connection: Support A2DP, AVRCP,HSP, HFP,compatible with all Bluetooth mobile phones and other Bluetooth devices. Noise-Canceling and Clear Sound: Adopt advanced 4 times anti-noise technology to make your conversation maintain in very clear sound, providing a comfortable and dynamic listening experience. Long Time Using: Built-in 3.7V/250mAH lithium ion rechargeable battery, 12 hours working time, 250 hours super-long standby. Applications: Business headsets suitable for call center, trucker, office staff and so on.