Feature:1. Ultra Low Latency: The neckband monitor headphone has ultra low latency within 20ms, and you can enjoy singing and band sound quality with the sound card.2. Long Battery Life: Wireless neckband monitoring headphone provides 9 hours of long battery life, no longer limited by battery life, suitable for stage, music studio, etc.3. Multipurpose: Multi function BT headset, can be inserted into the sound card device for live broadcast, karaoke, or used as a BT headset to connect to a mobile phone.4. Stable Signal: Wireless signal transmission of the neckband BT monitoring headset is stable, which perfectly solves the inconvenience of the wired method.5. Comfortable To Wear: Wireless monitoring earbud is neckband design, which can be worn for a long time without pressure. High quality ABS material, more durable.How to Use:Press and hold the power for 3 seconds on the receiver to power on, and press and hold for 3 seconds on the transmitter to power on.Specification:Item Type: Neckband Monitor HeadphoneMaterial: ABSHeadphone Receiver:Frequency Band Mode: 2.4GBattery Life: 9HTransmission Distance: >10m/32.8ftDongle Transmitter:Frequency Band Mode: 2.4GBattery Life: 10HTransmission Distance: >10m/32.8ftBuilt in Lithium Battery: 110mAh (Receiver), 220mAh (Transmitter) Package List:1 x Transmitter1 x Headphone Receiver 1 x Manual1 x Charging Cable