ER2559B Features Hi-Fi audio transmission function Provides hands-free conversations through your car speakers Supports full frequency range FM radio Support Blu-ray USB output charging for cell phones， GPS and other digital devices General Specs Frequency 88.1MHz-107.9MHz Transmission Distance Appr. 5 m Operating Voltage DC 5V USB Output DC 5V 800mA Charging Compatibility iPhone 4/5， Samsung， HTC， Sony， Blackberry & GPS Package Details Weight: 92.02 g Size: 13.2*12.6*3.1 cm