This little remote control would be handy for controlling a robot or other projects from across the room. It has 21 buttons and a layout we thought was handy. It works fine with many of these commonly available IR receiver ICs. It would be a great aid in remote control projects such as the Arduino IR Remote receiver. To get this remote controller along with an IR receiver, check out SEN-2685. These controllers come without battery! Just remove the plastic pull-tab to place the battery inside. To power, the control module, a CR2025 coin cell battery is suggested. It offers buttons marked for channel selection, media control, etc.