Model BT-518E Quantity 1 piece(s) Color Black + silver Material Plastic Screen Size 0.4" Function Handsfree / FM Transmitter / MP3 Player / A2DP Compatible Cellphone Iphone / Ipad smartphone and other devices with Bluetooth Phonebook Capacity N/A Bluetooth Version 2.1 Transmit Frequency 2.4GHz ISM Transmt Distance 10 m MIC Effective Distance 0.5~2m FM Frequency Range 87.5~108Mhz FM Transmit Distance 3M SNR >60dB dB THD Frequency Response 20Hz~15Khz Talk Time N/A H Standby Time N/A H Charging Time N/A H Charger Voltage N/A Battery Capacity N/A mAh Interface/Port USB / SD card slot External Card Max. Support 16GB Other Features Supports USB flash disk / SD card max. supports 16GB; Supports Bluetooth hands-free built-in microphone for convenient and safe call; Supports A2DP to enjoy music from your phone; Supports two cell phones Bluetooth connection; Supports USB / SD card MP3 format music playing; With multi-function infrared remote control achieves digital song choosing and frequency point choosing Certification CE / FCC Packing List 1 x Bluetooth handsfree car kit 1 x 3.5mm male to male cable (30cm) 1 x Remote controller (1 x CR2025 included) 1 x English / Chinese user manual