It Has 3 Buttons, A Red Stop Button, And 2 Yellow Up And Down Buttons. You Can Control To The Range You Need At Will The Outer Layer Is Equipped With A Metal Lock And Key, So There Is No Need To Worry About Being Operated By Others Adopt High-quality Abs Fireproof Metal Shell, Sturdy And Durable, Efficient And Dustproof Pure Copper Contact Button, Carefully Crafted From Selected Materials Style:a / B / C / D Colour:as Shown Material:abs+metal Package Contents: 1 Set * Surface-mounted Button Kit With Lock / 1 Set * Concealed Button Kit With Lock / 1 Set * Surface-mounted Button Kit (with Large Bottom Box) / 1 Set * Concealed Button Kit (with Small Bottom Box) 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.