I. Product Overview CAR A9 is a multifunctional in-car device that integrates on-board fast charging, Bluetooth hands-free calling, FM frequency modulation transmission, and lossless music playback. It is compatible with 12-24V vehicles and draws power through the cigarette lighter socket, requiring no complex modifications. It quickly adds in-car audio and video, charging, and calling functions to older or Bluetooth-free vehicles, making it a cost-effective and practical accessory for the car.
II. Core Specifications Table Parameter Item Details Product Model CAR A9 Input Voltage DC 12-24V (compatible with household cars, trucks, SUVs, and other vehicle types) Output Specifications Dual USB ports, total output 5V/3.1A (single port supports fast charging, compatible with phones, tablets, and other devices) Bluetooth Version Bluetooth 5.0 (stable transmission, low latency, compatible with mainstream mobile phone systems) FM Transmitting Frequency 87.5MHz-108.0MHz (supports full-band FM, compatible with all car radios) Music Formats MP3, WMA, WAV, FLAC, and other mainstream lossless/compressed formats Extended Storage Supports TF card (Micro SD card) playback, can be played through a USB flash drive (requires an adapter) Call Function Built-in microphone, supports Bluetooth hands-free calls, automatic answer/end calls Additional Functions Voltage Monitoring (real-time display of battery voltage), LED digital display, power-off memory, multi-level volume adjustment Installation Method Directly plugs into the cigarette lighter socket, plug-and-play, no modification required III. Detailed Explanation of Core Functions 1. Dual-Port Car Fast Charging Equipped with 2 USB output ports, total current up to 3.1A, can charge two phones/tablets simultaneously, solving the problem of insufficient charging ports in the car.
Supporting basic fast charging protocols, it boasts higher charging efficiency than ordinary car chargers and is compatible with most smartphones, dashcams, and other devices.
Equipped with built-in overvoltage, overcurrent, and short circuit protection, it prevents damage to batteries or charging equipment, ensuring safer use.
2. Bluetooth hands-free calling: Bluetooth 5.0 provides a stable connection to your phone. When a call comes in, it automatically pauses the music and switches to hands-free mode, eliminating the need to hold the phone, making driving and talking safer.
Equipped with a built-in noise-cancelling microphone, it reduces wind and road noise inside the car, ensuring clear and stable voice communication. It supports one-button answer/end and reject calls.
It supports incoming call announcement, and some models can synchronize with the phone contacts, allowing clear identification of incoming call information even while driving.
3. FM transmitter and music playback device can transmit FM signals, allowing audio from Bluetooth music on mobile phones, TF cards, or U-disks to be played on car radios, thus achieving an "in-car audio upgrade".
Supports full-band FM tuning from 87.5-108.0MHz, allowing selection of blank frequencies without radio station occupation, thus avoiding signal interference and ensuring more stable playback.
Compatible with TF card direct insertion playback, it can directly play music stored in the card without the need for a phone. It supports resume playback from where you left off, power-off memory, and automatically resumes the last playback progress when powered on.
It supports lossless music formats, which, when paired with car audio systems, can restore a more delicate sound quality. Additionally, it supports previous/next track and volume adjustment, making operation convenient.
4. The on-board voltage monitor comes with an LED digital display, which can show the real-time voltage of the vehicle's battery, allowing you to keep track of the battery status at any time and avoid the risks of battery depletion and malfunction.
The device automatically detects voltage upon startup, and in case of abnormalities, it will provide early warnings through digital display, such as battery aging and line leakage, thereby enhancing vehicle safety.
5. Digital display and convenient operation: The high-definition LED display screen can simultaneously show the current FM frequency and voltage, with an intuitive interface that allows quick information reading even while driving.
The physical button layout is clear, supporting channel adjustment (CH+/CH-), track switching, and call control. Even blind operation can be easily accomplished without affecting driving safety.
Support incoming call priority mode, automatically pause music when a call comes in, and automatically resume playback after the call is hung up, with no manual intervention required throughout the process.
IV. Applicable Scenarios and Advantages Core Applicable Scenarios Old/Low-end Models Without Bluetooth Function, Unable to Connect Directly to Mobile Phones for Music Playback and Phone Calls Insufficient Charging Ports in Cars, Requiring Fast Charging for Multiple Devices at the Same Time Looking to Upgrade the In-car Audio and Video Experience at Low Cost, Without Modifying the Audio Equipment Long-distance Driving Requires Hands-free Calling and Lossless Music Playback, Enhancing Driving Convenience Core Product Advantages Universal Compatibility: 12-24V Wide Voltage Adaptation, Applicable to Cars, Vans, and SUVs Plug-and-Play: No Wiring Breakage, No Modification Required, Simply Plug into the Cigarette Lighter for Use, Zero Installation Threshold Multi-function Integration: Charging, Calling, Music, and Voltage Monitoring, One-stop Solution for In-car Needs High Cost-effectiveness: Hundreds of Yuan Cost, Achieving Thousands of Yuan In-car Audio and Video + Calling Experience, Maximal Practicality V. Usage Precautions Frequency Matching: Before Use, Find a Blank Frequency Not Occupied by the Car Radio, and Adjust the Device to the Same Frequency to Avoid Signal Interference Causing Noise.
Charging safety: Avoid connecting devices with excessively high power at the same time, ensure that the total current does not exceed the upper limit of 3.1A, and prevent the interface from overheating.
Storage device: It is recommended to use the FAT32 format for TF cards, with a capacity not exceeding 64G to avoid device unrecognition. It is also recommended to store files in categories to avoid sluggish card reading.
Environmental adaptation: Avoid prolonged use in high-temperature and humid environments to prevent equipment aging or short circuits; it is recommended to unplug the device after parking to avoid battery depletion.
What's in the box
1 x A9 Car Bluetooth MP3 Player
