Video Call Telephone 4.3 Inch 480x272 Touch Screen PSTN Wired SIP VoIP Smart Video IP Phone for Android Item Type: Video Call Telephone Material: ABS Functions: PSTN Wired, SIP Network Phone, Automatic Manual Recording, Voice Message, Cell Phone Subsets, Etc. Usage: Flat, Slanting, Wall Mounted SIP Account: Support Up To 2 SIP Accounts (SIP2.0, UDP TCP TLS) SIP Sound And Video Protocols: for Opus, for ILBC, G.729, G,722, for GSM, G.711a U SIP Conference Call: Support Multi Party Conference Call (5+, Support One Click Conference Initiation And Dial In Participation) Number Of Subphone Types: Supports Up To 4 For IPhone And For Android Phones As Subphones Contacts Synchronization: Support File, Browser, Mobile App And Other Ways To Backup And Import Operating System: For Android 6.0.1 CPU: For Cortex A7 Memory: 512MB Storage: 8GB (Support U Disk, Memory Card, The Maximum Support 256GB Memory Card) Display: 4.3 Inch 480x272 LCD Touch Screen Speaker: 3W, 50mm / 1.97in Speaker, Airtight Sound Chamber WIFI: IEEE80211b G N 24G Wireless WiFi Storage Interface: Micro Storage Card (Memory Card) Support, Maximum Support 256GB Phone Interface: RJ11 PSTN USB Interface: Standard USB2.0 Wired Network Interface: RJ45 100M