Adjustable clamps expand to securely fit IPHONE. Galaxy HTC MOTO Lenovo most smart phones; (Adjustable clamps Maximum width:8.4cm) Set in seconds on any flat surface and stays put and easy to take down; Rotating head allows angle adjustments and horizontal or vertical device orientation ; With FM transmitter function frequency range:87.6~107.9MHz; Supports Micro SD card (MAX:32GB); With charging function output 5V /1A; Hands free talk function offer you more safety during driving ; 4-station programmable memory (micro earphone hole: 3.5MM); Comes with two charging cables: one for IPHONE the other one for compatible smart phones