... 2. 100% silicone 3. louder speaker 4, nice appearence bicycle speaker case for iphone 4, hands-free bike amplifier silicone ... dust,bump,scratches and finger print etc8.Fashionable feeling ,the case in horn amplifying design ,easily put on and take ... order are welcome12.package:polybag /pc,customizer packaging are available bicycle speaker case for iphone 4, hands-free bike amplifier silicone ...