Features: Support Bluetooth hands-free calling, built-in microphone, and noise processing CVC wind noise suppression during call. Automatically reconnect after power-on, automatically enter the pairing state. Support maximum 32GB TF card, support maximum 32G U disk (excluded), support MP3 WAV music format. Attached car charger output 5V-1000m can charge mobile terminal equipment. This product comes with LED display, mini portable type, plug and play. Specifications: Condition: Brand New Optional Color: Black, Silver, Gold, Pink Material: ABS environmental protection material Input: 12-24V Output: 5V 3.1A Bluetooth Version: V5.0 + EDR Frequency: 20h-20KHZ Sensitivity: - 42DB + / 3DB 360 Voltage: 5V +/- 0.5V Working Current: 45mA maximum Standby Current: 25mA maximum Frequency: 2.402-2.480ghz Effective Distance: 5 meters RF Output 4.DBM FM: 87.5-108.0MHZ Transmitting Power: 87.dBMUV/107dBuv Effective distance: 2 meters / 78.7in Package List: 1 * Transmitter 1 * User Manual .