... -3.5inch Digital photo frame,digital photo frame with keychain ,good idea for promotionKey Features:Features: 1) Display: 1.5-Inch CSTN ... 7V lithium battery or USB 5V supply; Interface: USB 2.0 5) Photo Play,can storage: 107 ... Contrast set and Background light set10) Support USB connect,Operation System: Win2000/XP11) Working Time ... Card,USB 2.0,stereo speaker,Slide show,CE,FCC,UL,RoHS,Mini PDF,key chain, ...