Professional heart rate, colour screen + touch, ip67 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 chip: Cpu nrf52832(m0) ram: 64 kb rom flash: 512kb+32mb bluetooth version 4. 0 strap material: Steel material front shell alloy material battery: 110 mah stand by mode: 5 days 2-5 days in integrated use and 11 hours in depending on usage heart rate chip em7028 support system: IOS 8 and android 4. 3 screen resolution: 240 240 1. 3 inch weight of watch: 45 grams complete package weight: 130 grams supported languages: English, French, Spanish, polish, Portuguese, Japanese, Italian, German, Czech, Russian package list: 1 x smart band 1 x charger cable 1 x user manual