It is not waterproof! -The factory refuse to provide any after-sales service for damage caused by water. About Quality problems -We open package to check every zikr ring works well before shipping, Avoid 99.99% of problems. but if you get bad product unfortunately, just send back the goods, we will refund you immediately. (we check Bluetooth connection function, charging function, and vibration function) Q: what is the difference about Zikr1 and Zikr1 Lite? A: material Zikr1 is metal, Zikr1 lite is plastic, Zikr1 has charge box, Zikr1 lite only has a charge cable Q: Maximum count ? A: No more than 999 Specifications: 1. Tasbiha counter 2. Oled screen 3. 5 Prayers Reminder 4. Work with IQIBLA APP (IOS; Android) 5. 3 Days battery life