Description This type of Bluetooth headphone allow you to communicate in a better way. Noise reduction device helps keep noise outside to create clear communications. Wireless Bluetooth helps you to chat with another people even though in a busy situation. Feature 1.Wireless connection 2.Noise cancellation design reduces ambient noise, enable clear sound no matter in calls or when listening to music. 3.Long standby time, it can work for a long period 4.USB charging, easy to charge no matter where you are 5.Clear timbre, suitable for all kinds of workplace, clip to anywhere, easy to operate. Specifications Condition: 100% Brand New Item type: Ear Hook Connect type: wireless Connect interface: K Wireless Connect type: Bluetooth Button control: support Audio control: support Noise cancellation: support Function: monitor earphone Waterproof: no Use manual 1. Power on and off: press the button 2 seconds to switch on and press the button 3 seconds to close down 2. Long press for 2 seconds to open the machine. The number of red light flashes shows the battery power and 4 flashes means that the power is full. Compatible with Transmitter module is compatible with all 2-Pin M Jack, 3.5mm / 2.5mm. Supported two way radios include: K interface for models Transmitter module is compatible with all the intercom 2-Pin K Jack, 3.5mm / 2.5mm. Package Include 1 x Bluetooth Headphone 2 Pairs x Ear Tip 1 x Charging Cable 1 x Manual 1 x Wireless Adapter 1 x Wireless PTT button 1 x The Elastic Belt Note: 1.Please allow 1-3 cm error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.