◆ Features a Bluetooth 6.0 chip design for enhanced compatibility and stability. ◆ Upgraded to support simultaneous connection of two mobile phones for music playback, allowing for seamless switching. Equipped with a 3.5mm AUX interface and USB power supply for plug-and-play convenience. ◆ Battery-free design; automatically powers on when connected to an external power source, ensuring worry-free operation. ◆ Built-in high-definition microphone supports wireless music playback, hands-free calling, and navigation. ◆ Simple product connection with no drivers or app downloads required; the product features a built-in isolation chip IC for noise-free transmission and clear sound quality. Product Model: A2R Bluetooth Version: Bluetooth V6.0 Supported Protocols: A2DP/AVRCP/HSP/HFP Operating Frequency Band: 2.402GHz - 2.480GHz Sensitivity: -85dBm < 0.1% BER; Signal-to-Noise Ratio: ≥90dB Distortion: ≤0.1% Interface Type: 3.5mm + USB Bluetooth Range: 10-20M (in unobstructed conditions) Charging Method: USB interface power supply Compatible Devices: Android and iOS mobile phones and tablets, active speakers, amplifiers, and other devices that support audio input. Color: Black Material: plastic Package Contents: 1*Car-Mounted Audio Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.