Highly sealed. Ip67 real waterproof.note: Blood pressure data is only for reference(might not be 100 percent accurate), not suitable for medical purpose. Heart rate monitor uses the brand new dynamic algorithm to monitor the heart rate, which is more accurate and more reliable than other smart bands as most of other smart bands in the market are only with static algorithms. Smart band model: Mantara is the only actual vendor for this listing, any other vendor giving on this listing is giving false items which will be involved in the brand infringement and we will take actions for this. And nbsp, you could tap the new to see the chart from us if you didn't find our chart hardware specification: Display: 0.96 OLED screen 96*64 LED 3D Display operation: Curved monitor sensor: Three-axis gravity acceleration sensor acceleration bluetooth: Compatible bluetooth 4. 0 (android and ios)ble contact type: Contact charging battery: 90mah polymer battery standby time: 5 days compatibility: Android 4. 4 or above, ios 8. 0 and above Band Size : 245X15X4mm weight: 28 gram waterproof level: Ip67 waterproof.