to 18kHz (±3dB) Operation Range: 100m/300ft (without obstacle) Operating Temperature: 14℉ to 122℉ (-10℃  to +50℃) Storage Temperature: 14℉ to 131℉ (-10℃  to +55℃) --Transmitter: RF Output Power: ≤10 mW Antenna: 1/4 Lambda wire antenna Spurious Emission: 250 nW or less Audio Input Connector: 3.5mm mini jack Reference Audio Input Level: -60dBV (MIC input, 0dB attenuation) Reference Deviation: ±5 kHz (–60 dBV, 1 kHz input) Input Frequency Range: 20Hz-20kHz Distortion: 0.5% or less Power Supply: Two AA size batteries Operation Time: About 6 hours Dimensions: 20.8 * 6.7 * 2.9cm (H * W * L) Weight: 80g (without batteries) --Receiver: Antenna: 1/4 Lambda 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 Ohm) Audio Output Level: -60dBV Power Supply: Two AA size batteries Operation Time: About 4 hours Dimensions: 20.8 * 6.7 * 2.9cm (H * W * L) Weight: 90g (without batteries) --Lavalier Microphone: Transducer: Back electret condenser Polar Pattern: Omni-directional Frequency Range: 35Hz~18kHz Signal / Noise: 74dB SPL Sensitivity: -30dB±3dB / 0dB=1V/Pa, 1 kHz Connector: 3.5mm locking mini plug Length: 1.2m / 4ft Package Size: 28.4 * 23.9 * 5.6cm / 11.2 * 9.4 * 2.2inch Package Weight: 928g / 32.7oz Package List: 1 * Receiver 1 * Transmitter A 1 * Transmitter B 1 * XLR Output Cable 1 * Stereo 3.5mm Mini Plug Cable 2 * Omni-directional Lavalier Microphone 2 * Microphone Holder Clip 2 * Wind Screen 3 * Belt Clip 1 * Shoe Mount Adapter 1 * Carrying Case 1 * User Manual (English) Note: Batteries are not included.