1. TF-361 is a wireless Flashgun remote control for Canon Camera 2. FSK modulation used to improve the reliability and stability of the product, use the free worldwide 2.4GHz frequency. 3. Shutter control: support single-shot, B gate (shooting), 3 seconds delay function. 4. Shutter Synchronization Time: 1/250S 5. Compatible Camera Type: Canon all EOS SLR cameras. 6. Compatible Flash: Canon flash, and other brands and Studio light. (Canon flash support call sleep function.) 7. Type: Using FSK 2.4GHz Wireless Remote Control System. 8. Transmission distance: 80 meters or above. 9. Channel: 16 channels. 10. Transmitter Standby time: more than 1 years (using the CR-2 lithium batteries). 11. The receiver standby time: 400 hours (using the CR-2 lithium batteries).