1) The bar is made from high quality chromium-vanadium steel; wire cut treatment at the pencil tip and the pencil body is made from Taiwan Chi Mei ABS757 plastic, excellent brightness and wear-resistance, no battery inside demanded.
2) Suitable for both night and daily use.
3) Consistently sensing and displaying.
4) Long service-life neon lamp: light/extinguish over 30000 times.