The ST-E10 Speedlite Transmitter is a compact, lightweight transmitter capable of triggering up to five groups or 15 individual Speedlites within a 98.4' range. By streamlining the design and removing the battery and ports, the ST-E10 also features an impressively compact and lightweight design with an intuitive single-button interface that enables making settings adjustments via the camera's own menu system or a connected mobile device. Compatible with Canon cameras featuring a Multi-Function Shoe, such as the Canon R3, this transmitter digitally connects to the camera via this shoe and also receives power from it; no batteries or connection cables are required. Wireless radio system uses 2-way radio wave communication for enhanced communication among units, including the ability to change settings such as mode, power, ratios, and recycle status, with a transmission distance of up to 98.4'.Flash settings can also be adjusted via a mobile device that is paired to the camera and running the Canon Camera Connect app.