RF wireless presenter 1.with 1pc AAA battery 2.wevelength :630 ... It contains two parts: transmitter and USB receiver.Function: 1, Laser pointer;2, Page up/down;3, mini ... can be stored into transmitter;Technical parameters: Others Feature:1, Mini receiver can be stored into transmitter;2, ... with AAA battery;3, Warranty period: 1 year;4, International standard met: CE, FCC, FDA & ...