Description Support all audio devices that have Bluetooth capability, such as cell phone, tablet, PC, laptop, Computer etc. Also can be used as wired headphone. 3.5mm Audio for jack, provides a simple wired connection of a variety of devices without Bluetooth. High-sensitive Build in Microphone, multi -directional speaker for virtual surround sound. Playing time up to 7 hours, and continue talk time up to 10 hours, standby time up to 250 hours. Support for TF card ,Bluetooth for Aux Function, Wireless Music. Best Choice for listening music, watching movie, chatting online etc. Specification: Bluetooth version: V5.0. Frequency: 2.402-2.480GHZ, 2.4G ISM band. RF performance: Receive sensitivity: -84dBm; Transmit power ≤ 4dBm. Frequency response: 20 Hz - 20 KHz. Signal to noise ratio (SNR): 70Db. Power indicator: blue light. Headphone charging: rechargeable 400MAH lithium battery. Charging port: mini 5-pin USB charging interface. Normal charging time: about 3 hours. Call duration: up to 10 hours. Standby time: up to 250 hours. Operating temperature: -20℃ - 55℃. Other features: Support status indicator, charging indicator display. Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package include: 1 * Bluetooh Headset. 1 * USB Cable. 1 * User Manual.