[Strong Signal]: Adopts technology , signal can pass through walls, floors and doors, steadily control receiver from any place within a reliable distance. Max range is up to 328ft/985ft with no obstacle. [High Power Load]: With 10A relay of receiver , which can load high-power electrical appliances to long-term stability control. [Easy To Control]]: Learning code has high-level security for its low repetitive rate and re-learn mode, it can delete the old code and re-learn a code,when a remote control get lost,So you could always control of it. [Easy to Use]: Extremely easy to setup, learn, relearn and control. Stable and reliable performance, high receive sensitivity.Configuration of 2 remote controls,more flexible use. [Wide Application]: It is mainly used in lamps,electric doors,,lifting equipment,gate,elevator,industrial control and security industry and other fields. Color: Black Material: ABS Package Contents: 4 x Remote controls 2 x Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.