Dual Wireless Microphone, 40h Long Endurance Charging case with Noise Reduction

Specification Customization Support Wireless transmission 2.4GHz self-adaptive frequency hopping Connection distance 1. cellphones 60 meters(with obstacles), 300 meters (Straight line distanace) 2. Camera 40 meters (with obstacles), 300 meters( Straight line distance) Microphone directivity Omindirection Signal/noise rate >70dB Maximum input sound pressure level 115dBSPL Sampling frequency and sampling depth 48KHz 24bit Battery capacity TX: 120mAh Camera version RX: 200mAh Charging case:1500mAh Endurance TX: ABOUT 10h RX: ABOUT 9h cellphone version charging case can charge two TX at one time for 5 times Charging time TX: about 1.5h RX: about 1.5h cellphone version charging case:<1.5h Size Tx: about D30*12mm RX: about 40*16.5*9mm charging  case: about 75.8*49*35mm Weight TX: about 9g RX: about 6g Charging case:  about 65.6g