Wireless Trigger Receiver
Multiple receiver units can be used to fire several remote cameras or off-camera flashes using a single transmitter or PIR Sensor v3.
Purchase the full Wireless Trigger Kit, including a transmitter and one receiver, here.
As standard, each receiver takes two AAA batteries. This gives a standby time of around 200 hours.
External Battery Modification
These receivers can also come with the parts for the external battery modification which means they can be powered by two AA batteries for a standby time of more than two weeks (please note that the maximum supply voltage cannot be greater than 3.3 volts). You can find out how to perform the AA battery modification in this video: Wireless Trigger Power Modification