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. 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 add external part so that it is more durable and flexible The material is fire-retardant ABS and the fire rating is V0 The Sonoff DR comes with 4 x M3 screws, which perfectly fit Sonoff& 39;s original holes, you don& 39;t need to open any holes Note: the DIN-rail is not included in the box. Package included: 1 x SONOFF DIN Rail Tray 1 x English and Chinese Manual Other items not included Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.