Specifications: Oscillator type: PLL Synthesized Control Oscillator Carrier Frequency Range: 556.71 MHz-575.98 MHz (Transmitter A) | 576.39 MHz-595.66MHz (Transmitter B) Channels: 48 Frequency response: 40 Hz to 18 kHz (+/-3dB) Operation range: 100m (300′)(without obstacle) RF output power: 10mW Antenna: 1/4 wire antenna Spurious emission: 250nW or less Audio input connector: 3.5mm mini jack Reference Audio input level: -60dBV(MIC input, 0 dB attenuation) Reference deviation: 5kHz(-60 dBV, 1 kHz input) Input frequency range: 20Hz-20KHZ Distortion: 0.5% or less Power supply: Two AA size batteries(not included) Operation time: About 6 hours Dimensions: 208(H) x 67(W) x 29(L)mm Weight: 90g without batteries Features: UHF frequencies for interference-free reception. 48-Channel for supporting more than two systems simultaneously. A or B channel group for selection. Wireless Microphone Transmitter with 40 MHz bandwidth. Includes Omnidirectional Lavalier Mic. Compatible with RX8 Pro and SP-RX8 Pro. Features a comprehensive LED display providing channel information, battery life. Operation range can reach up to 100m. Powered by one of Two AA Batteries. One Mic input and one Line Input. Enables switching between MIC and LINE IN input sources. Equipped with a muting function. Locked-plug Prevents Accidental Adjustment. Includes Lavalier Microphone. Package Included: 1 x Wireless Transmitter 1 x Microphone 1 x Lapel Clip 1 x Foam Windscreen 1 x Belt Clip