The Unify OpenStage M3 Ex Plus is a rugged DECT cordless device, certified according to ATEX/Ex specifications, designed for hazardous and industrial environments. It features a 1.8" TFT color display, illuminated keypad, advanced alarm functions (man-down, no-movement, alarm button), voice encryption according to DECT, Bluetooth headset support, IP65 protection, long battery life (up to ~17 hours talk time / ~200 hours standby) and multi-registration capability (simultaneous registration with up to 4 systems). It is compatible with HiPath/OpenScape DECT systems and intended for use in hazardous zones 1 (gas) and 21 (dust) with strict Ex battery/charging regulations.