Features: UHF wireless microphone system(1 * bodypack transmitters & 1 * camera-mount receiver), special designed for DSLR camera/ camcorder/DV sound recording. Adopts PLL(Phase Lock Loop) frequency system, FM modulation mode, more clear and more stable audio signal transmission. Preset 16 channels for more convenient usage, no interference and no crosstalk, with LED display showing the channel number. Infrared automatic frequency, transmitter and receiver can find the corresponding frequencies more conveniently and more accurately. Less than 3ms low audio latency, and effective operation range is up to 50 meters. Specifications: -Transmitter Input: 3.5mm plug RF Output Power: 15mW Power Supply: 2 * AA Batteries (Not included) Item Size: 9.5 * 6 * 2cm / 3.7 * 2.4 * 0.8in Item Weight: 72g / 2.5oz -Receiver Sampling Frequency: 48KHz Frequency Response: 80Hz-15KHz 2dB SNR: 100dB T.H.D: