All kind of cellphone charger, direct charger and USB charger. The paramenter for mp3/mp4 is 5V-300MA or 6V-200MA and the charger for cellphone is 300-500MA. 1000MA, 1500MA or even higher can be made as the buyer's order. The price is basic on different IC, so it's depends on ur order. Both Blank Brand and OEM can be done.