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 setting: 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. 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 setting: The closer the knob is to the maximum, the faster the PUSH dimming speed will be. The closer the knob is to the minimum, the slower the PUSH dimming speed will be. Memory function setting: Short press the "SET" button to switch the memory function. Without memory: LED indicator is red, after PUSH dimming and power cycle, light returns to maximum brightness. With memory: LED indicator is green, after PUSH dimming and power cycle, light restores the last brightness. Factory default: Without memory. Push-button function: Short press: Turn on/off light. Long press: Dimming up/down. Warnings: DO NOT install with power applied to device. DO NOT expose the device to moisture. Color: White. Material: Plastic. Package Contents: 1 x LED Dimmer (Due to different product batches, the appearance may vary slightly, which does not affect the use). Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1–3 cm.