ANRUI is a US Registered Trademark. Trademark Registration Number is 87062317. We has enrolled Amazon Brand Registry.All of our products have their GCID number. All ANRUI product are sold exclusively by ANRUI direct. We don't authorize other sellers to sell ANRUI product.Specification: VOL: 120db Dimension: 2.68*1.5*0.98inch Battery: 110mA,6V Color: Black Product Description: Whenever and wherever we much take care of ourselves,but We never noticed so,the accident happened. This personal alarm can reduce unnecessary accidents. What important: -When the alarm sound goes low, please remove screws from back cover and replace new batteries. -Pull off the hand strap to activate alarm. (To turn off the alarm, insert the hand strap to the plug.) -The alarm sound is very loud, please do not put by your ears. Warm tips: If you have any questions with the items, please feel free to contact us by email. We will always endeavor to assist with our quality service, to meet all of our clients' need, offer best solutions and do effective actions is our initial but final aim.