Fangrui Product Details Description: Sonoff Dr Din Rail Tray Is A Switchboard Solution For Sonoff Products. It Allows You To Install The Sonoff Products To The Din Rail Mounted Switchboard. As You Know, Most Of The Sonoff Products Are Not Din Rail Mounted, Which Makes It Difficult To Put The Sonoff Products Into The Switchboard. Now We Launch Another Inexpensive And Practical Accessory - Sonoff Dr - Din Rail Tray. We Provide This Product Just To Let Our Users Easily Install The Sonoff Switches To Their Switchboard. Note: The Din-rail Is Not Included In The Box. Sonoff Dr Can Work With Most Of Our Sonoff Products, Including Sonoff Basic, Sonoff Rf, Sonoff Pow, Sonoff Th10/16, Sonoff Dual, Sonoff G1. The Installation Is Very Simple. The Sonoff Dr Has A Blue Part, Which Allows You Push To Fix The Switch To Din Rail Or Pull To Take It Down. No External Tools Are Required. We Particularly Add External Part So That Its More Durable And Flexi The Material Is Fire-retardant Abs And The Fire Rating Is V0. The Sonoff Dr Comes With 4*m3 Screws, Which Perfectly Fit Sonoff's Original Holes, You Don't Need To Open Any Holes. Specifications: Package Included: 1*sonoff Din Rail Traynote: The Din-rail Is Not Included In The Box Notes: Due To The Difference Between Different Monitors, The Pictures May Not Reflect The Actual Color Of The Item. Compare The Detail Sizes With Yours, Please Allow 1-3cm Error, Due To Manual Measurement. Please Leaving A Message Before You Give The Bad Feedback, If The Products Have Some Problems. Thanks For Your Understandings.