Yealink EXP50. Product color: Black, Gray, Number of buttons: 23 buttons, Compatible products: SIP-T58V/SIP-T58A/SIP-T56A/SIP-T54S/SIP-T52S. Dimensions (WxDxH): 7.74 x 4.88 x 5.41" (196.5 x 124 x 137.5 mm)
Yealink WF40. Connectivity technology: Wireless, Host interface: USB, Interface: WLAN. Maximum data transfer rate: 150 Mbit/s, Top Wi-Fi standard: Wi-Fi 4 (802.11n). Product color: Black