Modulation mode: FMFrequency range: UHF620-690MHZPreset frequency points: 16 groupsFrequency response: 75Hz-1800HzSignal to noise ratio: above 80dBTotal harmonic distortion: <1.0%@1kHzHeadphone output level: 32 ohms, 65mWIdeal use distance: 50 meters (ideal environment)Power requirements: 3V DC (2 AA/5 batteries)Power consumption: transmitter-3V: 110mA/ receiver-3V: 300mAWeight: Transmitter: 80g (without battery) / Receiver: 80g (without battery)