Simply tap the panel, it's all under your control.
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Find more details here:
1. New Joyetech TAPTEC technology
2. Pressure-sensitive capability applied
3. 228W maximum output
4. Power/Clock/Temp (Ni, Ti, SS316)/TCR (M1/M2/M3)/USB Charge mode
5. 1.3 inch OLED display
6. Powered by dual 18650 battery
7. Upgradeable firmware