... control PPT page up and down, schedule/telephone recording, mp3 player Appearance:Packing:Size:Instruction:Instruction of telephone recording:CCC Certification ... lines include: smart phones, GPS, portable power banks, tablets, mp3/mp5, car electronics, etc. 4. Strong R&D, R&D ... Depts. Include: smart phones dept, car electronics dept., MP3/MP5/MID dept., DVD dept., portable power banks dept.5. Strong ...