found at DigiDirect
Dedicated to the Canon EOS 77D and Rebel T7i DSLRs, this BR-E1 Wireless Remote Control allows you to wirelessly release your camera's shutter via Bluetooth. It has low power consumption and requires no line of sight to the camera, and is also compatible with the PZ-E1 Power Zoom Adapter for remotely adjusting zoom position and movement of the EF-S 18-135mm f/3.5-5.6 IS USM lens.