Voltage (ac) 170-240v 50/60 hz power should be cut off when installing led bulbs. ambient temperature -20°c to -50°c, dry environment only. when abnormal conditions occur, please cut off the power immediately. the light intensity cannot be adjusted. it is produced by botech company. maximum 50 pieces of this product can be ordered. swordslife reserves the right to cancel orders over 50 pieces. more than 10 stocks are offered to be sold at the campaign price. the seller determines the selling price of the product you have examined. Create a party-ready atmosphere with this colorful LED lighting. Easy to install and perfect for events or home decoration.