• Painless acupuncture stimulation, no needles 
• Easily focus on pain areas, effectively relieve pain
• Help to stress relief and relaxation, easy to use
• With a function switch and high and low adjustment knob, 9 speed function 
• With 3 different massage heads for different use needs (one is already installed on the massage pen)

Specification: 

• Power supply: 1 x AA battery (not included)
• Output: 3.7V, 300mA±50mA
• Pulse frequency: 0.01-300Hz
• Pulse width: 100uS-320uS
• Output amplitude: 500ohm
• Load voltage: 3.3V