Promaster Wireless Remote Shutter User Manual page 9

3. Press the shutter button completely and hold until the transmitter LED light goes OFF. The receiver will now
lock the camera shutter for BULB.
4. To release the shutter lock, press the shutter button on the transmitter again, the receiver will unlock the shutter.
 5S Delay
1. Set the mode switch to the delayed exposure position. Set the camera to single exposure mode.
2. Press the shutter button on the transmitter half way to focus.
3. Press the shutter button completely. The camera will take a picture after a 5 second delay.