Features:¡ñDisplay: LCD display¡ñFull frequency range.¡ñMemory for last frequency.¡ñStereo Hi-Fi audio output¡ñBuilt-in Rechargable lithium Ion Battery¡ñCompatible with mobile phones and other devices with 3.5mm aux-out earphone jack¡ñCan play music on the mobile phones and works as hands-free car kit¡ñHands-free facility， call and talk without the need of holding phone while driving¡ñUSB cable for high speed chargingSpecification:¡ñFM transmission range: up to 10M¡ñ Temperature Humidity: -10c¡ã~65c¡ã / 98%¡ñ Operating Voltage: DC 3.3V¡ñ Reception Sensitivity£º< - 80dbm(Perl%)¡ñ SNR: ¡Ý45db (1KHz 100%)¡ñ Audio Distortion:¡Ü0.1% (F=75KHz f=1KHz)¡ñ Frequency Saving Method: Auto save after power off¡ñ 5.7cm*2.0cm*1.0cm¡ñ Frequency response: 20Hz - 20KHz¡ñ Transmission range: 87.5-108.0MHzCompatible models:iPhone (all include iPhone 4 4S 5 5S 6 6Plus)iPod (all)Galaxy S， S2， S3， S4All devices with 3.5mm headphones socketNote: Hands-free talking function only for iphoneHow to use1. Turn on the transmitter by switching it to ¡°ON¡±.2. Connect the transmitter with mobile phone or device with 3.5mm aux-out earphone jack.3. Press ¡°+¡± or ¡°-¡± on the transmitter to select frequency.4. Tune your radio frequency to the same frequency of the transmitter.5. Connect the transmitter with the car charger and insert the car charger on the cigar lighter socket to charge the transmitter. Music will be transmitted to the car radio stereo system and play while charging.Package includes:1 x 3.5mm FM transmitter1 x USB cable