1. Convenient operation, power saving, flexible and practice. 2. Vertical shooting more comfortable. 3. Same hold feeling as original grip. 4. Ergonomics design, operating comfortably. 5. Engineering plastic body and passed the drop test. 6. PU anti-scratch surface dealing. 7. Design with 1/4 inch standard screw hole, made of steady and precise 1/4 inch standard screw. 8. Compatible with Canon EOS 5D Mark III / 5DS / 5DS R Digital SLR Camera.