The title says it all: a little more expensive, but worth every Euro: + Retractable cord works perfectly for 1 month + MicroUSB eg for Smartphone and then another USB A port for charging free - what more could you want. + Long (100 cm) cable, if good connection and windshield further away (eg Skoda Octavia II). + LED does not interfere with (does not light up)
Use it with microUSB -> iphone adapter alternately for Android and iPhone mobile phone