Main Features: Compact dual-channel wireless microphone system Built-in omnidirectional microphones 2.4 GHz digital wireless transmission Transmission range up to 400 m 20 Hz to 20 kHz frequency response 100 Hz low-cut filter Maximum SPL up to 130 dB Bluetooth 6.0 Up to 11 hours of transmitter runtime Up to 10 hours of receiver runtime Compact transmitter weighing approximately 12 g Charging case provides up to 3.2 full charges of the system