High-performance SIP cordless phone system 1.8\' 128 x 160 TFT color screen with intuitive user interface Up to 8 concurrent calls Up to 8 DECT cordless handsets Up to 8 SIP accounts Support Opus audio codec Up to 18-hour talk time (in ideal conditions) Up to 200-hour standby time (in ideal conditions) Quick charging: 10-min charge time for 2-hour talk time TLS and SRTP security encryption Noise Reduction System Headset connection via 3.5 mm jack Charger wall mountable Hearing Aid Compatibility (HAC) compliant