Charge two devices simultaneously via USB 5V/2.4A and PD: 5V/3A, 9V/2A, 12V/1.5A for efficient charging. Large screen display with lossless sound quality; supports TF card playback with lyric display. Retractable spring cable design; includes AUX output, incoming call number announcement, and one-key answering and hanging up. Real-time battery voltage monitoring compatible with various car models for enhanced protection. Short press EQ button to adjust subwoofer mode. Bluetooth Version: 5.0 with 10m transmission range. Compatible with 12V-24V vehicles. Equipped with large LCD screen for improved night visibility. FM transmitter frequency range: 87.5–108.0 MHz (adjustable by pressing the CH button). Wireless hands-free calling with built-in microphone for safe and convenient call management (short press to answer/end, long press to reject). Streams music from smartphone to car stereo system via FM transmission. Supports TF card playback and plug-and-play AUX connection; allows direct phone connection without Bluetooth, reducing signal interference. Note: Slight variations may occur due to different production batches. Color: As shown in photo. Material: Plastic. Package Includes: 1 x Car hands-free FM transmitter. Contents limited to items listed above; other accessories not included. Note: Lighting effects and display differences may cause slight color variation between image and actual item. Measurement tolerance: +/- 1-3 cm