Product Description: Wireless Bluetooth 4.1 Audio Receiver Car Adapter - Your Ultimate Audio Solution Versatile Connectivity: Equipped with a 3.5mm interface and Bluetooth 4.1 technology, this audio receiver seamlessly connects to a variety of devices including earphones, mobile phones, speakers, and car audio systems. Enjoy the flexibility of a 2-in-1 design that functions as both a Bluetooth receiver and an audio adapter. User-Friendly Features: Experience the convenience of telegraphic number support and voice prompts in both Chinese and English (default English). The device automatically shuts down after 5 minutes of pairing inactivity, conserving battery life. A low power reminder alerts you when the voltage drops below 3.2V, with automatic shutdown at 3.1V. Intuitive System Controls: Easily manage power and volume with simple button controls. Power the device on or off by holding the power button for 5 seconds. Adjust the volume with a press of the + or - buttons for a seamless listening experience. Effortless Music Management: Control your music with ease. Play or pause tracks with a short press of the power button. Navigate through your playlist by long-pressing the - button for the previous song or the + button for the next song. Convenient Call Handling: Manage calls effortlessly with intuitive controls. Answer incoming calls with a short press of the power button, or reject them by pressing the power button during the call. The no-redial feature allows you to cancel redialing by double-clicking the power button. LED Light Indicators: Stay informed with LED light displays. During power-on pairing, red and blue lights flash alternately. A slow blue flash indicates a successful connection, while a flashing red light signals low voltage. Efficient Power Usage: Designed for optimal power efficiency, the device operates at a rated voltage of 4.00V. It features a paired state current range of 4.33 mA to 22.03 mA, with standby and music currents optimized for prolonged use. The device charges at 100.0mA and has a minimal shutdown current of 1.1uA. Enhance your audio experience with this Wireless Bluetooth 4.1 Audio Receiver Car Adapter, offering seamless connectivity, intuitive controls, and efficient power management for all your audio needs.