2.4G Hanging Neck In-ear Wireless Monitoring Headphones Long Playtime Sports Earphones 1. Get rid of the constraints of live broadcast and support simultaneous monitoring of multiple headphones (K6 is 1 for 1, K7 is 1 for multiple) 2. Intelligent compatibility: supports 99.9% of live broadcast sound cards, mobile phone computer cameras, audio, DVD, functions, and TVs on the market 3. Audio and video synchronization, e-sports-level low latency, fast and stable connection and signal transmission 4. 12mm large moving coil acoustic structure makes the human voice mellow, the high frequency is pleasant, and brings HiFi-level sound quality 5. Ergonomic design fits the auricle and is comfortable to wear. The soft ear cap makes it painless to wear for a long time. 6. Large capacity battery with 15 hours long battery life 7. Exquisite mini 2.4G wireless transmitter, automatic frequency binding, faster and more stable connection Parameter: 1. Bluetooth frequency: 2.4~2.48GHZ 2. Battery capacity: 300mAh 3. Transmission distance: 20 meters (barrier-free) 4. Charging time: about 2 hours 5. Transmitter input: Type-cLighting USB35mm interface 6. Transmitter battery: 300mAh 7. Material: K6 is plastic ear shell, K7 is aluminum alloy ear shell.