Takstar X3 Dual UHF wireless microphone system is redundant and dual antenna ensures an interference-free reception. Silica frequency doubling technology lock preventing interference noise and impulse noise .Pitanie microphone: 2 pieces x 1.5V AA • Frequency range: 740MHz-790MHz • Channel tunable 16L + 16R positions • reception mode: duplicated • Frequency: 60Hz-15kHz • Max. Frequency deviation: ± 45 kHz • Receiver Power: DC5V / 500mA (USB) • S / N ratio> 80dB • THD: 100 dB • Audio Output: unbalanced mixed • Transmission Power: <10 mW • Running time: approx. 10 hours (depending on battery) • Operating range: 50 m outdoors