Ultra-compact Size: The BY-V series is small and light, easy to carry, the weight of the transmitter is 9.5g, and the receiver is 6g. It's easy to use, just plug in the receiver and start recording right away2-in-1 Live Broadcast & Phone Charging: A USB-C charging port is designed on the side of the BY-V series receiver. During recording, if your device needs to be charged, you can connect to this USB-C port to charge itNoise Cancellation: NR button on the transmitter activates a noise-canceling mode that filters out most ambient noise, leaving only pure soundLong Battery Life: The transmitter can work continuously for 9 hours after fully charged, while the receiver does not need to be charged, which saves the trouble of interrupting the recording to charge the device Specifications: Transmission Type: 2.4GHzDirectivity: OmnidirectionalFrequency Response: 20Hz-16kHzSNR: 80dBSensitivity: -42dBTransmission Range: 50m (without obstacle)RX Output Power: 6dbTX Battery Capacity: 95mAhTX Charging Time: about 2 hoursTX Battery Life: about 9 hoursReceiver Power Supply Mode: external equipment power supplyBY-V2-TX: 9.5gBY-V2-RX: 6gBY-V2-TX: 52.22x25.23x19.75mmBY-V2-RX: 43.92x23.5x9.3mm