Main controller: Jerry 7013AS Memory: 128Mb FLASH Built in T card: 4GB Screen display LCD: 1.43 "AMOLED screen, resolution: 466 * 466 Display brightness: 600 lumens Touch screen: ONCELL technology Material: Zinc alloy surface shell+PC bottom shell+silicone strap. Bluetooth version: Bluetooth 5.3 Battery capacity: Polymer lithium battery 400mAh with battery protection IC Standby time: 30 days Working time: around 7 days Charging time: 3H Gravity sensor: SC7A20H Heart rate sensor: HX3918 Motor: built-in, size: 0827 Charging cable: magnetic suction cable with chip protection IC for charging Speaker: 1507 (waterproof speaker) Mic head: TMG4015 (waterproof microphone head) Waterproof grade: IP68 Charger requirements and specifications: Charging 1A or below Bluetooth calling Heart rate detection Blood oxygen test blood pressure detection GPS positioning Barometric altitude Off-line map compass Local music playback Time ,Pedometer,Calorie Consumption,Distance Calculation Multiple sport modes Sleep detection (Sleep time, Sleep quality) Calls to remind,SMS Reminder,Third-party messaging reminder :Multilingual push Ask Reminder (Sedentary reminder) Music control Synchronous data to APK/APP