screen size: 2.12-inch AMOLED screenscreen resolution: 485*520dpi AMOLED DisplayWatch size: 49*44*14.4mmBluetooth: Low power Bluetooth 5.2Built-in chip: newest SF32LB525CPU: Dual core architecture 1.4MB running memory + 2GB storage memoryNew Siche SF32LB525: High performance dual core processor, integrated high performance 2D graphics engine, and artificial intelligence neural network acceleratorScreen brushing rate: 240MHz+48MHz high brush screenOperation Dominant Frequency: 240+48MHz, make the peak performance more vigorous and lasting, and enable the rapid experience of new evolutionWaterproof level: life waterproofCharging type: Magnetic wireless chargingBattery capacity: 450mAhMenus style: 4 kinds of menus styleSupport: Android 5.0 and above & iOS 10.0 and aboveAPP: Wearfit ProFunctionAi watch face, ChatGPT, 2GB ROM, Local music, Sound recording, Calendar, Always-on display mode, Real Compass, Heart rate, Blood pressure, Blood oxygen, Sports, Sleep monitoring, Pressure, Activity record, Bluetooth calls, Message notification, Voice assistant, Music control, Weather, Alarm clock, Stop watch, Breathing training, Timer, Find phone, Alipay, respiratory rate, short video control, Camera control, Notification setting, Beside clock mode, Active wrist wake-up, Do not disturb mode, screen off time ,NFC door access, screen off watch face, Brightness adjustment ...NoteNFC door access ( It doesnt support NFC Payment ) : The watch has a built-in NFC chip, there is no NFC software icon on the watch, you only need to use the watch as an NFC access control card, record the NFC ID of the watch through the access control system, and then the watch can be used as an NFC access control card.(1). The NFC of this watch only supports as IC door cards with a frequency of 13.56MNZ (applicable to 80% on the market), does not support other functions.(2). The fingerprint lock enters the administrator mode-add-card-write.(3). Encrypted access control of the community needs to be written in the community property management office.Always-on display mode: it only have one watch face like screen off clock, but always-on display.ChatGPT: Some countries require payment in Wearfit pro to become a member in order to use this featureWaterproof: It is just life waterproof allow the watch to be used normally when washing hands and in rainy days, but not allow to swimming and bathing. It is not allowed to soak the watch in water! (Please be careful to avoid corrosive liquids like hand sanitizer, soap enter the watch and cause component damage.)Please use the original charging cable of the hk9 ultra 2 to charge the watch, other models of cables cannot support charging.Please use a 5V1A (5W max) power adapter to charge the watch, otherwise the watch may not charge!Smart Watch Support Language:English, Chinese Simplified, Chinese Traditional, Arabic, Dutch, French, German, Greek, Hebrew, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Spanish, Thai, Turkish, Ukrainian, Vietnamese, FarsiPackage:smart watch*1charging cable*1user manual*1original retail box*1