RGB Amplifier is used when connecting more then 2-3 full strips together. Example: RGBCON2-RGBFlexstrips-RGBFlexstrips-RGB Amplifier-RGBFlexstrips. You must purchase 12 vdc transformer to plug into this amplifier to boost your signal. Min 12vdc 1 Amp recomended. Input voltage 12-24v DC. Output power 180 Watts.