FlatFin Best Bluetooth FM Transmitter, Your wonderful car kit music adapter, USB car charger, Hands-Free calling, for iPhones, Android Smartphones, any Bluetooth devices, Committed to a more convenient life! Feature: Provides hands-free conversations through your car speakers. With a car charger port, you can use it to charge your device when you are driving. Designed for plugged in the car cigarette lighter, not pick car models. 1.44inch LED display, enable to show you the current voltage of the storage battery of your car, also show the name of songs or caller ID. Tips: 1,Press and hold the multifunction button 8-10 seconds, switch voice prompts in English or Chinese. 2,Adjust your transmitter and car radio to the same FM station to avoid noise. 3,To make sure the perfect sound, don't adjust the sound volume of the your car speaker to maximum; If you need louder sound, you can adjust the sound volume of your phone or FM Transmitter. 4,The product contain a AUX cable, but not include a TF/ Micro SD card. Specifications: Bluetooth Version: V3.0+EDR Frequency: 20 h- 20KHZ USB Charging Port Output: 5V/2.1A Sensitivity: -42db+ / 3db 360 Voltage: 5 V + / - 0.5 Working Current: 45mA (Max) Stand-by Current: 25mA (Max) Frequency: 2.402 ~ 2.480 ghz Effective Range: 5meters Sensitivity: -92 dBm RF Output: 4 dBm Frequencies: FM: 87.5MHz-108.0MHz Transmitted Power: 87 dBuv / 107 dBuv Effective Range: 2 Meters What's in the box? 1 x Bluetooth FM Transmitter 1 x Audio cable 1 x User Manual