One Step Nail Gel Pen Men\'s S1 supports continuous detection of

S1 supports continuous detection of heart rate

The material is safe and durable

please buy 2pcs or more

Moissanite can also pass a diamond tester

One Step Nail Gel Pen Men\'s S1 supports continuous detection of[3 in 1 design] Compared to traditional gel polishes, no primer topcoat is used, saving both money and time, but the charming color stays the same and is full of pure color. This one step gel pen is easy to color, very easy to use and saves a lot of time. Does it not crack, does not turn yellow, does not fall off, and is easy to remove.[Economical] If you don't want to pay too much for professional tools, this nail polish set is very economical and