Car FM transmitter Peiying 9878 with Bluetooth and 2× USB ports

The Peiying 9878 is a car FM transmitter that adds Bluetooth audio streaming, hands-free calling and dual charging to vehicles without built-in wireless connectivity. It connects to a smartphone via Bluetooth and rebroadcasts audio to the car radio over an FM frequency, while two USB ports allow charging or playback from USB devices. The compact design installs in a vehicle cigarette lighter or 12V socket and provides basic controls for volume, track selection and call handling.

Advantages

The unit enables wireless music playback on older car stereos that lack Bluetooth or auxiliary inputs, and supports hands-free phone calls to improve safety while driving. Two USB ports let you charge two mobile devices at the same time or play audio from a USB drive. Simple plug-and-play operation and accessible controls on the transmitter make setup and daily use straightforward.

Suitable for

• Drivers with vehicles that have FM radio but no Bluetooth or AUX input
• Users who need simultaneous charging for two smartphones or devices
• Commuters and taxi drivers who require hands-free calling
• People who want to play audio from a phone or USB drive through a car stereo

Key specifications

• Connectivity: Bluetooth audio streaming and FM transmitter
• Power: 12V vehicle power input (cigarette lighter / 12V socket)
• Outputs: Two USB ports for charging or USB audio playback
• Functions: Hands-free calling, track control, volume adjustment, FM frequency selection
• Form factor: Compact plug-in transmitter designed for dashboard or socket mounting

How to use

Plug the Peiying 9878 into the vehicle 12V socket and power it on. Pair your smartphone with the transmitter via Bluetooth following the device pairing procedure shown on your phone. Tune the car radio to an unused FM frequency and set the transmitter to the same frequency. Once paired and tuned, play audio from your phone or insert a USB drive to play stored music. Incoming calls are routed through the transmitter; use the built-in controls to answer, end calls or adjust volume.

Usage recommendations

For best audio quality, select an FM frequency with minimal local interference and keep the smartphone within the recommended Bluetooth range. Use original or high-quality USB cables for consistent charging. When driving, operate controls via steering-wheel buttons or set up prior to departure to minimize distraction.