ltem description from the seller
Product parameter
Modulation method: GFSK
Frequency range: 2400-2483MHz Frequency response: 50-15KHz
Signal to noise ratio: greater than 84dB
Distortion: less than 0.03% (32 ohms, 1KHz, 80MW) audio interface: 3.5mm interface
Operating distance: 20 meters indoor with obstacles, 50 meters outdoor without obstacles. Operating time: about 7 hours for transmitter and 9 hours for receiver. Charging interface: TYPE-C (USB-C)
Charging current: 450 mA
Product weight: 34.3g
Product size: 70mm*24mm*23.5mm