Q7 Portable Digital Display Bluetooth-compatible 5.3 MP3 Player 2-in-1 Receiver/Transmitter Car Audio Adapter Versatile Functionality: The Q7 offers Bluetooth-compatible transmission (TX),Bluetooth-compatible reception (RX),and TF card playback for ultimate audio versatility Digital Display: Features a clear digital display screen for convenient operation and status monitoring Advanced Bluetooth-compatible Technology: Powered by Bluetooth-compatible version 5.3V,ensuring reliable and high-performance wireless connectivity Wide Compatibility: Ideal for use with computers,televisions,projectors (in transmission mode),as well as speakers,headphones,and vehicles (in reception mode) Built-in Battery: Equipped with a 300mAh built-in battery with protective circuitry,providing up to 6 hours of music playback on a single charge Specifications: Chip: JL Bluetooth-compatible Transmit Power: 7dBm Output Impedance: 32Ω Frequency Response: 20-20KHz Signal-to-Noise Ratio: 90dB Microphone Sensitivity: -42dB Bluetooth-compatible Reception Effective Range: ≥10 meters FM Transmission Effective Range: ≥2 meters FM Transmission Frequency: 87.5-108.0MHz TF Card Playback: Supports a max of 32GB (with automatic power-off memory function,card not included) Input: 5V/2.1A Battery: 300mAh Charging Time: about 2 hours Music Playback Duration: about 6 hours Package included: 1 x Bluetooth-compatible Audio Adapter 1 x English User Manual 1 x Charging Cable 1 x 3.5mm Audio Head Other items not included