"Yealink DECT IP Phone • High-performance SIP cordless phone system • 1.8"" 128 x 160 TFT color screen with intuitive user interface • Up to 20 simultaneous calls • Up to 10 DECT cordless handsets • Up to 10 SIP accounts • IP67 Ruggedized DECT Handset • Support Opus audio codec • Noise Reduction System • FNR (Flexible Noise Reduction) • Up to 28-hour talk time (in ideal conditions) • Up to 360-hour standby time (in ideal conditions) • Quick charging: 10-min charge time for 2-hour talk time • TLS and SRTP security encryption • Headset connection via bluetooth • Alarm function • Vibration • Charger wall mountable with PSU"