For proper use, pair the remote with your camera first, each EOS model is a bit different but this is the basic steps for a Canon M50:
(1) Enable Bluetooth in camera menus (Menu - Setup tab - Wireless communication setting - Bluetooth function - Remote)
(2) Select "pairing"
(3) Hold down both the W and T zoom buttons on the remote simultaneously for more than 3 seconds
(4) When the camera asks if you'd like to pair with the remote, tap "OK"
Attention: when the above steps are finished, it just means the remote and the camera is paired, you still need to do one more step to make the remote work:
1. For still photos: Set camera's drive mode to "remote mode", (Enter the menu - in the Shoot setting (Has a camera icon, in the camera menu on the first tab) - Scroll down to "Drive Mode" - self-timer: 10 sec/remote - confirm by pressing the "SET"), then set the 3-way switch on the side of the remote to S or 2S icon.
2. For start/stop video: Set camera to video mode, enter the menu - in the Shoot setting - scroll down to "remote control" - ON, this setting is only available when the camera is in video mode, then set the 3-way switch on the side of the remote to video icon.
User notes:
1. The zoom button on the remote only works for the Canon EF-S 18-135mm f/3.5-5.6 IS USM lens with the required Canon PZ-E1 power zoom adapter.
2. Once you setup for the remote, you can't use camera's Bluetooth to setup the smartphone app.
3. Power zoom lenses can be zoomed directly by pressing the zoom button on the remote control;
4. Some lenses need to be used with the Power Zoom Adapter (not included in the package) to use the zoom button on the remote control.
5. During viewfinder shooting, the lens can not be zoomed by pressing the zoom button on the remote.
6. The lanyard is used for easier carrying,When the camera is fixed on the tripod, please do not use the lanyard to hang it, so as to avoid damage to the camera caused by the disconnection of the lanyard