Product Highlights: • Dual-Channel Wireless Receiver • 48 Selectable UHF Channels • Broadcast-Quality Sound • Includes Two Transmitters and One Receiver • Seletable Stereo and Mono Mode • Mic and Line-in • Selectable Mute function • Easy-to-read LCD displays • Automatic LCD-locked Function • Monitoring sound by headphone output (Receiver) • Operation range can reach up to 100m(300') (without obstacle) • Two AA batteries for both transmitter and receiver Specifications： System : Oscillator type: PLL Synthesized Control Oscillator Carrier Frequency Range: 576.4 MHz-599.9 MHz (Transmitter: A ) 568.6 MHz-592.1 MHz (Transmitter: B ) Channels: 48 Frequency response: 40 Hz to 18 kHz (+/-3dB) Operation range: 100m (300')(without obstacle) Operating temperature: 14° F to 122° F (-10℃ to +50℃) Storage temperature: 14° F to 131° F (-10℃ to +55℃) Transmitter： RF output power: ≤10 mW Antenna: 1/4λ wire antenna Spurious emission: 250 nW or less Audio input connector: 3.5mm mini jack Reference audio input level: –60 dBV (MIC input, 0 dB attenuation) Reference deviation: ±5 kHz (–60 dBV, 1 kHz input) Input frequency range: 20 Hz-20 KHz Distortion: 0.5% or less Power supply: Two AA size batteries Operation time: About 6 hours Dimensions: 208(H) × 67(W) × 29(L)mm Weight: 80g without batteries Receiver： Antenna: 1/4λ wire antenna Audio input connector: 3.5mm mini jack Signal-to-noise ratio: 70 dB or more Distortion: 0.5% or less Headphone output level: 30mW (16 Ω) Audio output level: –60 dBV Power supply: Two AA size batteries Operation time: About 4 hours Dimensions: 208(H) × 67(W) × 29(L)mm Weight: 90g without batteries Lavalier Microphone： Transducer: Back electret Condenser Polar pattern: Omni-directional Frequency Range: 35Hz ~ 18 KHz Signal / Noise: 74dB SPL Sensitivity: -30dB +/-3dB / 0dB=1V/Pa, 1 kHz Connector: 3.5mm locking mini plug Length: 1.2m (4’)