Battery；18500 Lithium-ion  

Nominal capacity：1600mAh

Motor: GERMANY FORMULA Pricious Metal Brush DC Motor

Motor Speed: 10500（rpm) Pricious  

Stroke:  2.5mm to 4.5mm, Continuously adjustable stroke 

Battery Voltage: 3.7V 

Power Intake: 5W  

Needle Protrusion: 0-5mm  

Charging Input: 5V/1A 

Pen Net Weight: 196g (without battery） 

Charging voltage: 5V-2A  

Pen Length: 144mm

Working Hours: 4-8h

1. Adjustable stroke: adjust from 2.5mm to 4.5mm. 
2. Japanese precision motor: good quality, sufficient power
3. The replaceable battery: 18500 Lithium-ion battery is available
4. Memory function: retain timing data even after you change the battery
5. An internal circuit protection system: prevent damage to the chip after incorrect installation.
6. High-definition OLED screen: show voltage, hertz,timing and power display
7. Anti-slip grip：use more comfortable
8. Alternative colors：black, blue, rose red, purple