VoIP SIP-DECT Ruggdized Phone. (TFT) display 2" Directory with capacity for 200 contacts. Ambient noise filter for loud environments, 44 polyphone ring tones, 29 normal ring tones and 7, alarm tones with automatic volume control. Up to 5 user profiles can be configured, Hands-free operation, Headset connector (2.5 mm jack) and Bluetooth (hands-free profile) headset support. 1 programmable hot key, 2 programmable navigation keys, 2 programmable soft keys, and 3 programmable side keys, Intelligent battery management. Mini USB PC interface, Tri-color multi-purpose LED indicator, Support of message & alerting applications, Optional microSD card to save local device data.