Mettle Radio Trigger: Wireless Camera Flash Remote Control Mettle radio trigger is a compact wireless device that enables photographers to remotely activate camera shutters and synchronize off-camera flashes. Utilizing radio frequency signals, it ensures reliable communication between the camera and accessories, even over long distances. Ideal for studio setups, outdoor shoots, or dynamic environments, radio triggers eliminate the need for physical cables, offering flexibility in lighting placement and creative compositions. Many models support multi-channel functionality, TTL metering, and compatibility with major camera/flash brands. With quick setup and stable performance, radio triggers streamline workflow and expand creative possibilities for both amateur and professional photographers.