Key Features:Dual system 4G smart watch 3+32 large memory, 1.39AMOLED. 454*454 highest clear screen.Large capacity 800mah battery, long standby, 8.0mp ultra clear camera.Detachable strap, convenient to use.6739+52840 quad core processor.Manufacturer SpecificationsGeneral Item type:WatchBody memory: 3G+32GScreen material: AMOLEDSIM card type: Nano cardBattery capacity: 800mAhCompatible platform: ANDROIDScreen size: 1.39"Communication function: supportScreen resolution: 454*454Mode of operation: touch + buttonModel: Optimus PROColour: BlackStrap style: sportyApplicable people: business, adult, fashion, sportsWearing method: wrist strapProduct weight: 70gProduct size: 49mm Thickness 15.6mm Length 274mmCommunication type: Cannot insert cardInterface: pogoCompatible system: fully compatibleMenu language: multi-languageStrap size: M / L (suitable for 150-200 mm wrist circumference)Applicable platform: android platformFunction: taking picturesWristband material: siliconeCamera: 8.0MPPackage I