Wireless Bluetooth FM Transmitter for Car Bluetooth FM Radio Adapter Music Player Hands-Free Calling and 2 USB Ports Charger QC3.0 Quick Charging Support USB Flash Drive

Using Tips? First, find a blank frequency (no sound from the radio station) with rustling on the car radio instead of directly inserting the fm transmitter into the car lighter. Next, insert the transmitter into the car lighter and adjust the frequency to the same frequency as the car radio. At this moment, the car radio should be quiet without static sound (changing it if it is static), which is the ideal frequency. Finally, plug in a USB flash drive or connect to your phone via Bluetooth to enjoy playing music and hands-free calling. NOTE: Please NEVER use it in these conditions: Moist or underwater conditions. Near heater or high-temperature service. With direct and strong sunshine. Never dismantle it without due permission. Package contents: 1x Bluetooth FM Transmitter with Dual USB Charge Port 1x User Guide