4G SIP Video Intercom • 4G Singal, Built in antenna (Internal or external antenna) • HD Audio & Video /Video Linkage /Self-Diagnosis /Auto Provision • Dual SIP line, Dual SIP servers and Onvif • 1 ports delay output and 1 ports sensor short circuit input • Broadcast function ,Ethernet RJ45 port, POE • Video codec H264, H265 codec,4MP Video Camera • Aluminum alloy housing, stability & reliability • Unlock door with DTMF, DTMF tones • Wall mounting,Products Dimensions: 105×175×38mm • Compact design, easy to embed into a bollard • 1 nano SIM slot, FDD/TDD LTE: B1/3/5/8/34/38/39/40/41