Godox Camera Shutter Release Remote Control for Canon Rebel T5i T4i T3i T2i T1i T3 XS XTi XSi SL1 Digital Camera Senior non-slip surface lines, according with human body engineering design requirements. Half Press the focus, all Press take photos, and with a lock button. Using polymeric plastic materials, more waterproof, prevent grind, security falls. Take the lock button, more convenient and practical. Support single shoot, shoot, support long exposure time.