Display> 160x320 graphic LCD> LCD Backlight> Two accessible pages> A diverse range of actionable, LCD-accessible iconsFeatures Keys and Indicator> 20 physical, dual-color LED programmable keys> 18 additional keys available> Programmable keys enable users to partake inadvanced call functions such as: BLF list, multi-personconferencing, call forwarding, LDAP,XML browser functionalityPhysical Feature> Stand with two adjustable angles> Two or less expansion modules can bepowered by the host phone> Supports up to six modules> 2xRJ12（6P6C）ports for data in and out> Dimension (W*D*H*T):122mm*143mm*110mm*45mm> Applies to Yealink SIP-T27G/SIP-T27P/ SIP-T29G> Operating temperature: -10~50°C (+14~122 °F)> Operating humidity: 10%-95%Package Features> Qty/CTN: 20 PCS> N.W/CTN: 8.0 kg> G.W/CTN: 8.8 kg> Giftbox size: 169mm*133mm*82mm> Carton Meas: 455mm*366mm*314mm