... full frequency range(88.1-107.9MHz)8.Built-in speaker and rechargeable battery9.LED screen show call phone number,sequence ... Button, UP/DOWN Buttons (Volume, Call Lists, etc.), LED Indicator Light, Speaker, MIC, USB power input Color: Silver Bluetooth Type: Version 2 ... to recharge this item 10 meters connectivity range VERY LOUD SPEAKER, easy to hear calls Car power input 12V-24V, USB ...