PURPOSE: Suitable for indoor and outdoor environment communication, anti-riot and waterproof. FEATURES: 1.Strong and durable, high-grade aluminum wire drawing panel, can be embedded in the walls or external loading (with bottom box); 2. Single call (set the goal in server), realize full-duplex talkback; 3. Built-in speaker and microphone narrowed head, hands-free call and broadcast receiving; 4. With audio output port, can connect active speaker or headset from external ; 5.Pretection grade is IP54, with puncture-proof protection equipments and special screw, prevent the man-made destruction; 6. Works everywhere as long as Ethernet available, support span net segment and routing; SPECIFICATIONS NAS-8513 NAS-8516 POWER SOURCE DC 12V POWER CONSUMPTION less than 5W DISPLAY SCREEN LCD 16 Char x 2 INTERFACE 1 RJ45 In,1 Short-in,1Short-out,1Line out 1 RJ45 In, 1 short-in, 1 short-out, 1 Line out, 1 mic in DIMENSIONS 115x50x255mm 198X105X45mm