1.Built-in 18,000mAh rechargeable battery which can provide 12 hours cordless working 2.Perfect thumb nail / big toe solution , cure faster 3.There are 8 pcs (on both of right and left side, each side 4pcs) LED beads at the bottom which specially design for thumb / big toe nail curing, dry as fast as other nails 4.With LCD time display and battery indicator 5.10/30/60/99S timing curing mode (99s for low heat mode)