Anti-Collision in the sit-stand desk industry is a difficult concept to explain, as technically no desk can avoid a collision.  What is referred to as anti-collision is in fact impact protection – where a desk will stop if it encounters a solid object when it is either rising or being lowered.  The motors/electrics on all our desks are programmed to sense the extra pressure that the obstacle puts on them, and intelligently stop, and traverse the opposite way to ease the pressure.  If you would like extra protection, where the desk will stop movement at the slightest tap, we can then offer a plug in module to increase sensitivity.