2 AAA batteries required, 10.5 x 1.4 x 4 cm; 60 Grams Easy to activate // Lightweight // Discreet // Attaches to your keys // Loud siren High powered siren to attract attention Warning notes: 1. The alarm sound is very loud, please do not put near your ears 2. Do not aim the LED light at your eyes,the bright lights will damage your eyes. 3. This item is not completely waterproof, please not put it in the water and make it in a dry condition as possible. 4.The alarm can be reused, Non-disposable product. There MAY BE EXTRA CHARGES DEPENDING ON COUNTRY TO DELIVER (PLEASE EMAIL IF UNSURE AT 730.EDITOR@GMAIL.COM) PRODUCTS NON-REFUNDABLE BUT WILL BE LOOKED INTO CASE BY CASE SITUATION IF NEEDED