1. 2Port USB Car Charger with QC3 Technology: Supports simultaneous charging for two devices and includes a builtin Bluetooth transmitter. One port features Quick Charge 3.0, delivering charging speeds up to 4 times faster than standard chargers—compatible devices can reach 80% battery in just 35 minutes. The second USB port (5V/1A) also functions as a USB music playback port. 2. Bluetooth Wide Compatibility: Equipped with an advanced Bluetooth chip, this transmitter ensures faster pairing and more stable audio transmission compared to conventional products, effectively preventing connection instability. Compatible with all Bluetoothenabled devices. 3. LED Display: Monitors realtime battery voltage, charging voltage, and current. Features a sleek design with dual USB outputs, ecofriendly Bluetooth reception, USB music playback, and FM reception/playback on the same frequency. 4. Hands Calling: Integrated performance microphone with noise cancellation for crystalclear calls. Onetouch controls allow you to answer, dial, reject, or end calls. Supports private calling for safer driving.