[. . . ] DUAL VHF WIRELESS SYSTEM PDWM 2500 OPERATION MANUAL DUAL VHF WIRELESS SYSTEM OPERATION MANUAL Thank you for buying the PDWM2500 Wireless System. [. . . ] Do not use any solvents to clean any part of the wireless system . Precautions Hand-held microphone Receiver unit/operation Installation Trouble shooting Specifications 1 1. Unscrew the battery cover at the end of microphone, put a 9V battery into compartment with correct polarities, then close the cover. Move "ON/OFF" switch to "ON" position, "PWR" indic ator comes on b lue. If it does n't come on, please check the voltage of battery or polarities. If the "LOW" indicator comes on, this indicates the battery is dead. The "MUTE" switch cuts off audio output without powering off the microphone. Move the switch down to engage the mute feature, and up to turn it off. 2 1. Pull out the antennas A and B. 2. Insert one end of attached audio cable into "AF OUT" on rear panel, and the other end into "MIC IN" or "AUX IN" of amplifier or mixer. [. . . ] Transmitter Mike capsule: Pre-emphasis: Antenna: RF output power: Spurious emission: Battery: Power Dissipation: Quartz controlled VHF 160~270MHz 30ppm FM 75KHz >100dB >60dB <0. 5% 80Hz~20KHz at 3dB Up to 240 Feet -20~50 6dB V at S/N>20dB >50dB 50 s 1V p-p 600ohms DC 12V/ 200mA <800mW Dynamic microphone 50 s Built-in housing <10mW >40dB one 9V battery <250mW 6 [. . . ]