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: 1. 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 setting: 1. The closer the knob is to +, the faster the PUSH dimming speed will be. 2. The closer the knob is to -, the slower the PUSH dimming speed will be. Memory function setting: Short press the "SET" button to switch the memory function. 1. Without memory: LED indicator is red, after power cycle, light returns to maximum brightness. 2. With memory: LED indicator is green, after 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 usage.) 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 differ slightly from the real thing. Measurement allowed error is +/- 1–3 cm.