【Battery Voltage Monitoring】Monitors your car battery voltage in real-time, ensuring optimal performance and preventing unexpected breakdowns 【BT 5.4 Connectivity】Features advanced BT 5.4 technology for stable, high-quality wireless audio streaming and hands-free calling 【Dual PD Fast Charging】Equipped with two PD ports delivering up to 35W output, rapidly charging your devices while on the go 【FM Transmitter】Built-in FM transmitter (87.5MHz-108.0MHz) allows you to play your music through your car's audio system 【Ambient Lighting】Seven-color ambient breathing light with adjustable modes adds a personalized touch to your car's interior 【Lossless Audio Playback】Supports MP3/WMA format playback via USB, ensuring high-fidelity audio reproduction for an enhanced listening experience Specifications: Product Net Weight: 39g Product Dimensions: 5.4 x 4.6 x 7.65cm BT Version: 5.4 Working Voltage: 12-24V Voltage Limit: 9-26V Dual PD Output: 5V/3A, 9V/3A, 12V/2.92A, 15V/2.33A, 20V/1.75A (Max 35W) Simultaneous Output: 5V/3.4A FM Transmission Frequency: 87.5MHz-108.0MHz BT Transmission Range: 10M Supported Audio Formats: MP3, WMA