Hk8 pro max ultra smart watch men 49mm amoled screen compass nfc smartwatch blood pressure fitness watch for android ios 2023 description: size: 2.02 oled original screen motherboard cpu :sf32lb551 (si che) display resolution: 2.02 inches oled original screen 485*520 heart rate chip: spreading constant 1662 bluetooth: bt5.1 touch: full touch oled pedometer: sc7a20 battery: 380mah appearance size 49*44*14.4 charging mode wireless charging ic:9001(5v power supply mode) waterproof ip68 shell material zinc alloy iml strap optional silicone watch color black, green, gray, yellow, orange, etc function and introduction calls: bluetooth calls are supported the music function can control mobile phone music and play music. memory function 128mb 256mb