Features:Product NameSTN01 Bluetooth Wireless headphoneBluetooth VersionV5.3Charging Case Capacity400mAhMusic Time12 HoursCharging Time2-3 HourStandby Time120 HoursWorking Distance10 MetersBluetooth ProtocolHSP,HFP,A2DP,AVRCPFunctions: Adjust volume, switch songs, answer calls, reject calls, hang up calls, Bluetooth-compatible playback, phone replay, Bluetooth-compatible reconnection, voice prompts, battery display, FM, TF, EQ, English broadcast;Type: Bluetooth-compatible headset;Bluetooth-compatible: Bluetooth-compatible 5.3;Noise reduction: CVC6.0;Transmission distance: 10m;Battery capacity: 400mAh;Sensitivity: 1053db;Horn diameter: 40mm;Playing time: about 12h;Standby time: about 120h;Charging time: about 2h;Built-in microphone: yes;T F card: support;Charging port: USB;Song switching: support (shortcut key);Volume adjustment: support (long press the function key);Answer the call/hang up the call: support (short press);Audio I/O interface: support;Packing list:1 x Bluetooth-compatible Headset1 x Charging Cable1 x Instruction Manual1 x Packing BoxNote:1. Since the size and weight are manually measured, there may be some errors in the weight and size of the product due to different measurement methods, but this error does not affect the normal use of the product. Please confirm that you know and accept the error before purchasing.2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.