waterproof
the component inside are sealed very waterproof to IP 67
rechargeable
charge one time ,can use 3 month or longer
long protection
date can keep 10 years with power off protection
large storage
circulating storage ,129,536 pieces records
convenient
use USB-B cable to connect with computer
Long service life
at least 3 years
shockproof
rubber shell very shockproof
operability
have no button,easy to operate
Battery
3.7V 300mAh rechargeable Lithium Battery
