Q4 2-in-1 TX/RX Adapter Bluetooth-compatible 5.3 Car MP3 Player with Light Versatile Functionality: The Q4 car MP3 player offers a 2-in-1 feature with both Bluetooth-compatible transmission (TX) and reception (RX) modes,as well as TF card music playback Advanced Bluetooth-compatible Technology: Featuring Bluetooth-compatible version 5.3 for enhanced connectivity and performance Wide Compatibility: Suitable for various applications,including computers,televisions,projectors (in transmission mode),speakers,headphones,and vehicles (in reception mode) AUX Interface: Equipped with an AUX interface for flexible audio input options Long-lasting Battery: With a built-in 300mAh battery and protective circuitry,enjoy up to 6 hours of continuous music playback Specifications: Chip: JL Bluetooth-compatible Transmission Power: 7dBm Output Impedance: 32Ω Frequency Response: 20Hz - 20KHz Signal-to-Noise Ratio: 90dB Microphone Sensitivity: -42dB Bluetooth-compatible Reception Range: ≥10 meters FM Transmission Range: ≥2 meters TF Card Playback: Supports MP3/WAV formats with automatic power-off memory function,up to 32GB cards Input: 5V/2.1A Battery Capacity: 300mAh Charging Time: About 2 hours Music Playback Time: About 6 hours Package included: 1 x Bluetooth-compatible Adapter 1 x English User Manual 1 x Charging Cable 1 x 3.5mm Audio Head Other items not included