1: This caller can display the phone number and  hands-free calls after pairing  successfully by bluetooth .
2: Support calls and SMS vibration alert; Support synchronize the phone book; 
3: Support anti-lost: after losing the Bluetooth connection, it will be vibrating within 10 meters.  
4: Can answer / call / hang up the phone (hands-free), it also has the funcion of call-back.
5: Supports synchronous MP3 music playback with phone.
6: 24 hour time display, support external headphones; 
7: Standby time: 2~3 days, charging time: about 2 hours; 
8; Support  multiple languages: Chinese (Simplified / Traditional), English, Korean, Russian, Spanish, French, German, Italian, 
Portuguese, Arabic, Japanese; 
9: Supports all mobile phones with Bluetooth function.