LED Recessed Lighting Retrofit is widely used in bathroom in hotel, office, room, school, commercial central and outside lighting. It's made with easy installation and removable springs to avoid ceiling damage. Integrated design are suitable to replace incandescent bulbs or halogen bulbs. With an average life of up to 25,000 hours, you can enjoy "light in its most beautiful form" by zemismart. With a power of 12W, this LED replaces a 35W halogen lamp, saving you 90% electricity costs. Brand name:ZEMISMARTModel:HGZB-07AWireless Protocol:ZigBee 3.0Bulb Type:LED Power:12WLumen:700-800LMColor:RGBW Bulb Support Dimmer:YesInput Voltage:100-240V ACLifespan: 50000h Openning size: 3.5-4.0inch(90-102mm) Diameter: 4.25Inch / 108mm Height: 2.17Inch / 55mmBeam Angle:>120 degrees The way of connection to Alexa Echo Plus ZigBee 3.0 Smart RGBW 3.5 inch Recessed Retrofit Downlight 12W 10cm LED Dimmable Fixture Ceiling Light Multi-Color Compatible with Alexa Echo Plus,support voice control. Send order to Echo Plus:‘Discover device' After you hear echo plus says ‘you can turn on your light’ ,then you can power on your light And echo plus will say‘Find new device *** light’ Now you can control the light by use its name,and you can see the new device name in your App. If you want to change the device name, you can create a group and add the device to this group.now you can use the name you like to control the light. App Control ZigBee 3.0 Smart RGBW 3.5 inch Recessed Retrofit Downlight 12W 10cm LED Dimmable Fixture Ceiling Light Multi-Color Compatible with SmartThings Higher light Transmission cover Easy through the light,Indicates the ability of the light source to accurately reproduce the true colors of the objects it illuminates. Aluminum Housing Diverging Aluminum base ,easier and faster to cooling down than close plastic shell Stainless steel spring clip Stainless steel spring clip,reliable and durable. Physical reset button Resetting Button,after connect power press this button for 15s until light colorful /white light flash ,reset succeeded. Transmission cover Aluminum Housing Spring clip Resetting Button Step 1 3.5 inch Downlight suit for 3.5-4.0inch(90-102mm) ceiling can Step 2 Connect the LED Drive to home electric power Step 3 Squeeze the spring buckle of kit together and insert them inside the housing retaining bracket. Push to the recessed housing Step 4 Light on and Pairing,tun on/off 5 times until light flashing