Item Type: Clock Rings

Material: Silicone

Water resistance: IPX7 waterproof

Power supply: lithium battery charging

Power source: built-in lithium battery(rechargeable)

Size: 3.8 x 1.6x1.1"

Color: Purple

Weight: 84 g

Quantity: 1 Set

Package includes :

1 x Clock ring

1 x USB cable