Key features: Working band 520-550MHz UHF 16 channels for each microphone (32 channels in total) Easy-to-use user interface with display on transmitters and receiver Single-chip design with high-quality preamp, DSP and frequency synthesis (PLL) Simple and quick pairing of devices using infrared High performance battery Preferred working distance 50m Professional microphone with dynamic cardioid capsule Body-pack with 3-pin mini-XLR connector and LCD display System: Frequency: UHF 520-550MHz Frequency stabilization: Automatic calibration Dynamic Range: >90dB Total Harmonic Distortion (THD): 40dB Battery: 2x1.5V AA alkaline batteries or 2x1.2V rechargeable batteries Working time: about 5 hours Microphone dimensions: Ø33 (min) - Ø48 (max) x 248 mm Microphone weight: 0.215kg (with batteries) Body-pack dimensions: 62 x 30 x 103 mm