Kocaso Mini Universal Wireless FM Radio Transmitter (3.5mm Jack for Phone, MP3 Player, Universal Aux Port Devices, Radio Station Transmitting, USB, Digital Display) - Silver/Black UNIVERSAL WIRELESS FM TRANSMITTER - This FM transmitter eliminates the need for an audio jack or Bluetooth in your car audio system - just plug it into your phone or MP3 player and turn on the radio! SIMPLE USE - Insert the 3.5mm plug into your device just as you would a pair of headphones. Turn on the transmitter and set it to an FM frequency that's not in use in your area. Set your car radio to that frequency and you'll hear the music! The transmitter will play all audio from your phone, so you can use it to make hands-free calls as well. USB - Charge the transmitter from any USB port with the included cable. The battery has a long standby time, so you'll get plenty of use between charges. DIGITAL DISPLAY - The transmitter has a digital display that shows the FM frequency and the battery level for easy use. INDUSTRY LEADING CUSTOMER SUPPORT - You can continue to rely on Electro-Deal to offer the markets most competitive prices, paired with industry leading customer support, and all backed by a one year, full manufacturers warranty on new products or a 90 day limited warranty for refurbished products! Output Voltage: 50.1V Battery: 100 mAh FM Frequency: 87.5-108.0MHZ Frequency Response: 100-15000Hz Transmission Distance: 5 meters Storage Temperature: -4F-120F Operating Temperature: 10F-100F Size: 2.361.460.39 (LWH) Weight: 0.55oz Package Size: 5.023.150.79 (LWH) Package Weight: 1.5oz FM Transmitter USB Charging Cable