Incredible Microphone – Hi-Cut Receive Filter SR-25MC is a tiny radio with a size of 4.88″ (L) x 3.97″ (W) x 1.41″ (H) & weighs 0.94lbs. Its size gives you an edge when it comes to mounting. You can compare its size with the size of the iPhone 7. SR-25MC is a power radio with a heatsink, and you can easily transmit 20 watts PEP on high power. A cast aluminum heatsink efficiently dissipates heat and makes it a very rugged chassis. It means this stabilizes the circuit board and make it virtually immune to vibration. SR-25MC has an AMAZING LCD with 7 different colors. This multi-color display makes it sharp and easy to read at night. It means, if the lights are too bright, a 6 level dimmer allows you to select the perfect illumination amount, which makes the screen reading easy for you day or night. Excellent Microphone: SR-25MC microphone sounds Crystal Clear and has up-down buttons to adjust many features & functions. It means you can control many features through a microphone while driving a rig. Key Features High & Low Power (4 watt or 10-watt carrier) Channel and Frequency Display Operating Voltage CTCSS / DCS (encode & decode) 38 CTCSS / 104 DCS Backlit Keys Integrated Automatic SWR meter RF gain Of / Auto + 10 Attenuation Levels Squelch (Manual or ASQ) and Volume Adjustable Dual Channel Watch Digital S-meter Display Roger Beep function (8 settings) General Specifications Modulation Mode : AM/FM Frequency Range : 28.000 ~ 29.700MHz (FM) 28.000 ~ 29.700MHz (AM) Frequency Tolerance : ±5.0ppm Input Voltage : 12/24V Dimensions(in mm) : 124(W) x 163(D) x 39(H) Weight : Approx.670g Frequency Control : PLL Synthesizer Operating Temperature Range : -20° C TO + 55° C Current Drain [ Transmit, Receive, VOL Max] : 5A MAX, Squelched 0.3A, 0.8A Antenna Connector : UHF,SO-239 Transmitter Specifications Power Output : 4 WattsFM/AM / 10 Watts AM/FM Transmission interference : inferior to 4nW(-54dBm) Frequency Response : 300-3000Hz Modulated signal distortion : Inferior to 5% Output Impedance : 50 ohms Receiver Specifications Sensitivity : Less than 1uV for 10dB(S+N)/N Image Rejection : 70dB Adjacent Channel Rejection : 60dB IF Frequencies : 1st 10.695MHz – 2nd 455KHz