Sonoff IP66 is a high quality waterproof case that can be used with Sonoff Basic/RF or the PCBA board of Sonoff Pow/TH10/TH16/G1 in the underwater environment. The waterproof level of the waterproof box is IP66. It allows you to remote control your lights or home appliances outdoor. Just get it to control your Christmas tree lightings! Read the detailed installation guide.