The M30 features a large colour display and fits smoothly into our line of professional handsets. It combines crystal-clear audio quality with essential call functionality and typical business functions such as holding or forwarding. Its powerful battery allows up to 22 hours talk time or up to two weeks stand-by time - you won't miss a call! Four additional keys are easily configured for speed dial and local contact numbers that can be called with the touch of the key. Useful shortcuts to frequently used menus, e.g., ringtones, message box, or message sent, can also be programmed to enhance user experience. An M400 base station with up to twenty M30 handsets can handle ten parallel SIP phone calls. The single-cell M400 DECT base station offers the full range of telephony business features.The base station allows to manage up to 10 parallel calls with up to 20 SIP accounts. For Cloud and VoIP PBX partners, the M400 offers remote maintainability and zero-touch deployment. The M400 complies with the latest encryption standards and shares the same architecture as the M900 multicell system for the latest software and security updates. M30 Features - Multicell Compadible - Backlit Keyboard - Long Stangby Time - up to 350 h standby time, up to 22 h narrowband talk time, up to 14 h wideband talk time - Intergrated Phone Directory - OTA Updates - Belt Clip M400 Features - Up to 20 Handsets - Up to 10 Parallel Calls - Wall Mountable - Wideband Audio (HD Voice) - DECT - Single Cell - Power over Ethernet (PoE) - Security (TLS & SRTP) - OTA Updates - Intergrated Phone Directory