The Kestrel Electric Floor Series has internal Radio Frequency (RF) and Infrared (IR) receivers Standard Universal Learning IR Remote (ZR800D) to control the Projector, Screen, TV, and DVD, up to 8 devices simultaneously Built-In 5-12V projector trigger – Synchronize Screen Up/Down with Projector On/Off Rises and lowers by our motorized precision “scissor-backed” cross spring risers Tubular motor allows swift operation with a superior weight tolerance and operational lifespan.