Instructions: MODE/SPEED key: Short to turn white-select mode; long to turn red-select 5 speeds COLOR/BRIGHT key: Short to turn white-select color; long to turn green-select 4 levels of brightness two keys at the same time: at the same time to turn blue-to learn the environmental noise spect and hold COLOR at the same time when power on: enter gain setting mode Power on (battery model only): the COLOR key after power off; Shut down (battery model only): keep face down for 3 seconds Product Description: Built-in highly sensitive microphone (voice control) colorful lamp beads 18 color modes adjustable Comes with AGC automatic gain control Exclusive intelligent de-noising algorithm, can be used in noisy environment Input voltage: Greater thanDC 5V 1A Input interface: Type-C USB Frequency response: 100-16KHZ Optical characteristics (wavelength): Red: 620-625nm Green: 520-525nm Blue: 460-470nm Optical characteristics (brightness): Red: 450-550mcd Green: 1300-1500mcd Blue: 350-400mcd size: 250 x 25 x 22mm Material: Acrylic colour: As shown Package Contents: 1 x led Light 1 x USB Cable 1 x Lamp Base 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.