Small Dimmer for Drivers or Ballasts.Unidirectional and broadcasting communication.Control by conventional push-button, with or without memory:Short press: turn on /off light.Long press: dimming up/down.Dimming speed adjustable by rotary knob.for address setting1. Address value = Left rotary switch value x 10 + right rotary switch value.For example : Left rotary switch value is 5, right rotary switch value is 4, Address value = 5 x 10 + 4 = 54.2. Unicast mode : Address value 0-63 corresponds to addresses 00-63.Group mode : Address values 70-85 correspond to groupings 0-15.Broadcast mode : Left rotary switch value is 9.PUSH dimming speed setting1. The closer the is to "+", the faster the PUSH dimming speed will be.2. The closer the is to "-", the slower the PUSH dimming speed will be.Memory function settingShort press the "SET" button to switch the memory function.1. Without memory: LED indicator is red, PUSH dimming and then power on again, light returns to maximum brightness.2. With memory: LED indicator is green, PUSH dimming and then power on again, light restores the last brightness.Factory default: Without memoryPush-button functionShort press:Turn on / off light.Long press :Dimming up/down& WarningsDO NOT install with power applied to device.DO NOT expose the device to moisture.Colour:WhiteMaterial:plasticPackage Contents:1 x LED Dimmer(Due to different product batches, the appearance , which does not affect the use)Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.