Signalling - Quick Call II, DTMF, limited MDC1200 Power Output - 25W Option Board - Yes Keypad - No Display - No Emergency Button - No MilSpec - MIL-STD 810C, D & E Weight (gm/kg) - 1.01KG Frequency - 136 - 162MHz /403 - 470MHz / 450 - 527MHz Channels - 4 Dimension (H X W X D) - 55mm x 176mm x 177mmFlexibleTwo choices of signalling protocol: MDC1200 and Quick Call II. Programmable channel spacing of 12.5/ 20/ 25 kHz offers versatility and easy migration of channel spacing. The transmit power level can be adjusted to accommodate users environment, thus minimizing the risk of interference with other systems.EfficientLarge control buttons and the LED indicators provide clear feedback of the radio operating status 4-channel operating capacity allows individually programmed channels for enhanced communication efficiency, Voice compression and low level expansion technology ensures crisp, clear and strong audio quality. VersatileOptional voice storage board allows recording and playback of messages for up to 120 seconds. Repeater/ Talkaround Enable/ Disable feature gives freedom to communicate via a repeater for wide area coverage; or bypass a repeater and talk directly to another unit for easy local unit-to-unit communications