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Features:*LED Display the FM frequency/track*Support multipoint connections: can connect two phones at the same time.*Built-in FM transmitter， full frequency: 87.5-108.0 MHz*Bluetooth hands-free kit， with built-in microphone *Support USB disk and Micro SD card， support TF card *Excellent voice quality， use the DSP (digital signal process) technology to echo cancellation *With 3.5 mm line-in jack， support external audio devices *Switch to hands-free mode automatically from music playing status when receives an incoming call*Double USB charging ports for charging iPod/iPhone， Samsung， iPad， Nokia and other mobile devices*Support 12-24V voltage from the car cigarette lighter Specifications:Size: 8.0 x 7.0 x 3.2cmPackage weight: 2.1 oz/61gThe audio cable length: 70cmFrequency range: 87.5-108.0MhzOutput Frequency: 20Hz-15KHzSupply voltage: 12-24V Rated current: 90mAPower consumption: 1WWork temperature: 0-50 degreesSupport file format: MP3/WMAUSB Charge output: 5V/2.1A Music format: MP3 formatUSB Maximum support: 32GMicro SD Maximum support: 32GBluetooth version 2.1 + EDRTransmit distance: 10mOperating system: Win XP/Win vista/Win7Compatible Modes:for IPod/iPhone， Samsung， iPad， Nokia and other mobile devices How to use it:Using FM transmitter function:1)Plug the FM transmitter into your vehicle's cigarette lighter or power port2)Tune your radio to an unused FM frequency， then match with the same frequency of this product3)Insert a USB flash drive or Micro SD card which containing MP3 files into USB port or memory card slot of thisproduct accordingly， it will play and transmit the MP3 files automatically 4)Line-in function for: Use the included audio cable to connect an MP3/Mp4 players or another external devicesto the AUX input of this product. This item will play and transmit the music files of MP3/Mp4 players or otherexternal devices， and all functions of this item will be controlled by the external device Using Bluetooth function:1)Plug the FM transmitter into your vehicle's cigarette lighter or power port2)Tune your radio to an unused FM frequency， then match with the same frequency of this product3)Using Bluetooth for the first time， you need to pair your mobile phone with this product. Activating yourphone's Bluetooth function， then search new device. When the mobile phone detects this product (named asCAR KIT)， Please pair and connect by using the original password: 0000)2. In the music playing mode， when there is an incoming call， this unit will automatically switch to telephone modeNote: The Bluetooth indicator light which on the top of screen will stop flashing after the Bluetooth connectedwith your mobile phone Bluetooth calling:1)Please press the Answer/Hang off button to answer the incoming call2)Please press the Answer/Hang off button to hang off a call 3)When making a call， you can only dial the phone number by your mobile phone， but once the call connected，you can use the hands-free function to enjoy it. Package Details:( Without Retail Box.)1 x Bluetooth MP3 Player FM Transmitter Hands-free Car Kit Charger1 x Audio cable 1 x Remote controller1 x User Manual