Functions
1. Radio frequency transmitting function
2. Read U disk (audio/video/picture)
3. Bluetooth function
4. Wired mobile phone screen mirroring, wired and wireless Android AUTO/iOS CarPlay
5. Rear view function (camera optional)
6. Driving recorder function (driving recorder optional)
7. Video output/audio output function
8. White light

Basic Parameters:
1. Model: B5540 Category
2. Type: Portable car MP5 (sunshade type)
3. System: Allwinner melis system
4. Software solution: F133
5. Radio transmission frequency: Default transmission frequency 88.60, 89.50, 91.50, 93.00, 93.90, 95.10 MHz (optional frequency range 87.50-108.00MHz)
6. Radio transmitter IC: AB5301B
7. Power amplifier IC: CS8571E
8. Output power: built-in 1W speaker
9. Working voltage: 12~30V
10. Working temperature: -10~60 degrees Celsius
11. Bluetooth version: version 5.0 (default name: SWL-BT)

Performance Parameters:
1. CPU: F133
2. Running memory: 1Gbit DRAM
3. Display resolution: 1280x720
4. Screen size: 4.7 inches (IPS display)

Size Parameters:
1. Installation size: 65x65mm
2. Case size: 126x83mm
3. Host depth: 25mm
4. Single unit weight: 0.44KG

Function Parameter:
1. Mobile Internet: Supported
2. Reversing image: Support
3. Steering wheel remote control: supported
4. Video output: support
5. Driving recorder: supported (recorder optional, not included)
6. Built-in speaker: supported
7. USB interface: USB2.0 x 2
8. Reset button: Support

RCA Port Parameters:
1. Audio output: Support (left channel + right channel)
2. Video output: support
3. Reverse video input: supported (camera optional, not included)

AUX port & format parameters:
1. External microphone: supported (microphone optional)
2. Audio format: MP3, AAC, APE, OGG, M4A, RA, WAV
3. Video format: H263, H264, H265, DIVX HD, AVI, FLV, MKV, MPEG, MP4, WMV9, VC, ASF, TS, QT
4. Image format: JPEG, PNG, BMP, GIF, TIFF

Other Parameters:
1. Languages: English, Chinese, Spanish, Portuguese, Russian, German, French, Polish, Turkish, Arabic, Hebrew, Italian, Czech, Japanese, Korean:
2. Factory setting password: 113266

Accessories:
1. Host x 1
2. Instruction x 1
3. Cigarette lighter power cord x 1
4. Installation bracket x 1
5. Remote control x 1
(Accessories, instructions, and packaging will be updated from time to time, subject to actual receipt of the goods)