Long press the top white button ( 3-5 seconds ) to match frequency before use. . 1.Make sure that the remote control is not exposed to moisture , as this may adversely affect performance or may not work Warnings .2.Old or different types of batteries can not be mixed .3.. Install the battery according to the positive and negative markings in the battery compartment .4.When the remote control is not used for a long time, please remove the battery . 5.Waste batteries on the recycling of used batteries in the trash, so as not to cause environmental pollution