3 in × 17

the device can reflect the user's heart movement timely and accurate

2) take off the plastic from the eyeball

Charging method: USB magnetic suction

Operate on smooth ground

Casual Lapel Solid Color Long-sleeved Shirt for Men Kids Shoes 3 in × 17Product information Style: Cardigan Edition type: Loose Collar type: Lapel Sleeve length: long sleeve Pattern: plain Thickness: Thin section Error range: 2 3CM Main fabric composition: cotton The content of the main fabric ingredient: 100 (%) Color: blue, dark gray Size Information: Size: M, L, XL, XXL, 3XL, 4XL Note 1. Asian sizes are 1 to 2 sizes smaller than European and American people. Choose the larger size if your size is between two sizes.