Grandstream Networks GSC3570. Display diagonal: 17.8 cm (7"). Display technology: TFT. Display resolution: 1024 x 600 pixels. Voice codecs: AGC. AJB. CNG. G.711. G.722. G.726-32. G.729A. G.729B. OPUS. PLC. VAD. iLBC. Product colour: White. On Screen Display (OSD) languages: Simplified Chinese. Traditional Chinese. German. English. Spanish. French. Italian. Portuguese..... Placement supported: Vertical. Compatible memory cards: MicroSD (TransFlash). Maximum memory card size: 256 GB. Ethernet interface type: Fast Ethernet. Ethernet LAN data rates: 10.100 Mbit/s. Wi-Fi standards: 802.11a. 802.11b. 802.11g. Wi-Fi 4 (802.11n). Wi-Fi 5 (802.11ac)