IC-M502 Specifications This information is taken directly off of the ICOM IC-M502 brochure.   General Frequency range: Tx: 156.025 - 157.425 MHz Rx: 156.050 - 163.275 MHz Mode: 16K0G3E (FM) 16K0G2B (DSC) Usable channels: All international, USA* and Canadian* channels, plus 10 Weather channels.* (USA version only) Power supply requirement: 13.8 V DC ±15% Current drain (at 13.8 V DC): Transmit: 6 A (at 25 W output) Receive: 1.2A (at max. audio) Operating temp. range: -20°C to +60°C; -4°F to +140°F Frequency stability: ±10 ppm (-20°C to +60°C) Antenna connector: SO-239 (50 ohm) Dimensions (projections not included): 165(W) x 110(H) x 84.4(D) mm 6 1/2(W) x 4 11/32(H) x 3 5/32(D) in. Weight (approx): 1.13 kg; 2 lb 7.8 oz   Transmitter Output power: 25 W or 1 W (at 13.8 V DC) Modulation system: Variable reactance freq. modulation Max. frequency deviation: ±5.0 KHz Spurious emissions: -70 dB Residual modulation: More than 40 dB Adjacent channel power: 70 dB   Receiver Receive system: Double conversion super-heterodyne Intermediate frequencies: 1st 21.7 MHz 2nd 450 kHz Sensitivity: less than 0.25 µV (at 12 dB SINAD) Squelch sensitivity: Less than 0.3 µV Adjacent channel selectivity: More than 80 dB Spurious response: More than 80 dB Intermodulation response ratio: More than 80 dB Audio output power: More than 3.5 W (at 10% distortion with a 4 ohm load)   Supplied Accessories Hand microphone Spare fuses DC power cable Mounting bracket kit Owner's manual   Options MB-75 FLUSH MOUNT KIT: For flush mounting the IC-M502 to a flat surface such as a control panel. UT-98 VOICE SCRAMBLER UNIT: Enables private communications by scrambling your voice signal. Up to 128 scrambling codes are available. Not available in some countries. Scrambling system is not compatible with UT-112. UT-112 VOICE SCRAMBLER UNIT: Enables private communications by scrambling your voice signal. Up to 32 scrambling codes are available. Not available in some countries. Scrambling system is not compatible with UT-98. OPC-999 EXTENSION CABLE FOR HM-127: 6 m (20 ft) of extension cable for the HM-127. Same as supplied with the HM-127. COMMANDMIC (HM-127) REMOTE-CONTROL MICROPHONE: With slim dimensions, the HM-127 fits in your palm comfortably and with the sizable LCD, allows you to control all functions of the main unit (except DSC operation). You can talk with the main unit as an intercom. 6 m of extension cable is attached to the unit. Equivalent to JIS grade 7 waterproof construction. Black or white versions available. Size: 59.9(W) x 121.4(H) x 30.0(D) mm 2 11/32(W) x 4 25/32(H) x 1 3/16(D0 in. Weight (approx.): 160 g ; 5.64 oz