Bluetooth Version: V3.0 + EDR, class 2 and class 3 Effective Bluetooth Range: 10 meters FM Frequency: 87.5MHz - 108.0MHz Voltage: 12-24V Audio Format: MP3/WMA/WAV/FLAC SNR: >93dB USB Output Specification: DC5V, 2.4A Color: Black Support USB Flash Drive: Yes Support TF Card: Yes Working Temperature: 0 to 50 centigrade Compatible with: All Bluetooth cell phone and pad Package Weight : 40 G / 1.41 Ounces Package Dimensions (L*W*H) : 60*30*18 MM / 2.36*1.18*0.71 Inches Feature: - Small appearance size, practical in most of the cars - Support bluetooth 4.0/3.0/2.0, Support voice & calling prompt - Support charger for Android & Iphone or other device, max. Output 3.1A - Full frequency FM transmitter, total support 208 frequency - Digital Display - Support TF card/U disk MP3/WMA music play - Bluetooth answer, hang up, reject, redial calls and other functions - Echo cancellation and noise suppression (CVC) technology during a call - Automatic power-off memory function - Bluetooth stereo A2DP music play