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.