Projector remote control Name card remote control Max: 21keys Certification: FCC, CE, PAHS, Size: 86.5*40.5*7.2mmKey number. 21keysSupply Voltage:CR2025 size battery * 1pcsControl distance: Horizontal: α>=30° (A: 7meters). DC 3.0V Vertical: β>=20°(A: 7meters). DC 3.0V 10 meters in line of Min. DC 3.0Certification: FCC, CE, PAHS, Projector name card remote control