Power Supply DC 12V (allowance range 10.8-14.5V) Max. Current 10A Screen Size 9 inch. 4G LTE sim card slot Yes. 2USB Adapter Cable 1GPS Antenna. Hands Free Yes A2DP (Bluetooth Stereo Music) Yes, can play stereo music through Bluetooth Bluetooth Music Control Yes, play/pause/previous/next PB-Download Yes, can download phonebook from mobile to this unit PB-Search Yes, can use the first letter to search contact member in PB-Listings Calling Records Yes, Dialed Call, Received Call, Missed Call Setup Auto Answer, Auto connect, Device name Built-in Microphone Yes, on the front panel.