1、MULTIFUNCTIONAL: Support PSTN wired phone and SIP network phone, users can choose different methods according to their needs, which is convenient to communicate with family members, friends, colleagues and so on. 2、MULTIPLE SIP ACCOUNTS: Smart video telephone supports up to 2 SIP accounts, users can manage multiple phone accounts at the same time to realize more flexible and convenient talking. 3、SUBPHONE EXTENSION FUNCTION: Video call telephone supports up to 4 for iPhone and for Android cell phones as subsets, which extends the range of the phone and makes it easy to receive calls from different locations. 4、MULTIPLE SOUND VIDEO PROTOCOL SUPPORT: Video telephone supports multiple sound and video protocols, including for opus, for iLBC, G.729, G.722, for GSM, G.711a u, which can be selected according to your needs to ensure clear and stable call quality. 5、4.3 INCH LCD TOUCH SCREEN: Video telephone is equipped with a 4.3 inch 480x272 LCD touch screen, through which users can intuitively operate the phone functions, providing a more friendly and convenient user experience. 6、LARGE STORAGE SPACE: Video telephone has 8GB of built in storage space and supports USB flash drive and memory card expansion up to 256GB, allowing users to store more call logs, recordings and individual information. 7、MULTIPLE WAYS TO USE: Touch screen video call telephone can be installed flat, tilted or wall mounted to meet the needs of different usage scenarios, suitable for home and office and other environments. 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 1 x Video Call Telephone 1 x Earpiece 1 x Base Bracket 1 x Handset Cable 1 x Phone Cable 1 x Power Adapter