Key Specifications/Special Features: LCD and OLED display keyboard Three programmable power outputs Three grades controlling password Dual telephone pockets Handsfree two-way communication functions (subject to the control center support) Remote control programming functions Compatibility of most communication format Supports wired and wireless communications Telephone line monitoring function Storing eight group telephone numbers Power supply protection function Can shut-off accessory power supply port Events memory function Locking keyboard function Upload and download functions Wireless expansion functions (need to install wireless module for match) Bus expansion function (optional) Dial-up voice warning function (optional) Voice monitoring function (optional) Payment Details: Payment Terms: Telegraphic Transfer in Advance (Advance TT, T/T) Delivery Details: Lead Time: 1 - 10 days