1. Install 2pcs AAA battery, adjust the the strength to weakest.
( The roller on the up right, can control the strength, up is weak, down is strong )
2. Hold " Power " button down for 3-5 seconds until the light is red.
3. Choose the modes : Pulse / Numb / Absorb / Auto.
4. Role the roller down slowly, to adjust it to the strength that is suitable for you.
5. "Adjust": Controls the 'shock' frequency
CAUTION: To avoid injury or aggravation of pre-existing conditions, this product should not be used on bruised, swollen, or inflamed areas including skin lacerations. Discontinue use immediately if irritation or discomfort occurs.
Disclaimer: You assume full responsibility for handling this device, it's proper use and any consequences that may result from lack thereof.