Welcome to our store! We present our FM transmitter, perfect for iPhone/iPod/HTC/MP3/MP4 players and most devices with a 3.5mm audio jack. With this transmitter, you can enjoy your favorite music on the go without any worries. With a built-in 300mAh rechargeable battery, you can enjoy up to 10 hours of continuous playback. It's perfect for long trips or daily commutes. Our FM transmitter supports FM's latest frequency memory function and uses PLL phase-locked loop technology to ensure stable output under all conditions. You can also use it for hands-free calls via your car's stereo speakerphone, promoting safe driving. With a built-in digital tube display, it's easy to read and causes no distractions while driving. With left and right buttons, you can easily adjust the FM frequency. Just connect the transmitter to your phone or other device and tune it to the same channel as your car radio. With a transmission distance of 15 meters, it is the most powerful transmitter available. Specifications: - Charging: 5V 1A - AUX connection: 3.5mm audio jack - FM display: 88.1Hz-107.9Hz - FM connection: same frequency - Audio input: 3.5mm audio jack - Volume adjustment: none - Power switch: ON-OFF switch - Audio output: FM band connection output - Frequency adjustment: press \">\" to increase frequency, \"<\" to decrease frequency - Output voltage: 5 ± 0.1V - Vehicle current: ≤600mA - Storage temperature: -20°C ~ +50°C - Working temperature: -10°C ~ +40°C - Stereo resolution: ≥38dB Package list: - 1 * User manual - 1 * Charging cable - 1 * Transmitter Note: The hands-free function is not based on the microphone of this transmitter. The transmitter itself does not have a microphone. Connect this transmitter to your phone and use your phone's microphone to make a call. Please find the most suitable local channel that does not conflict with the local radio frequency for optimal performance. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the item, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.