Smart bluetooth watchStep counting, smart reminder, remote control selfie, health monitoring, information push, sleep analysisProduct information:Screen size: 2.5 inchesInterface: USB 2.0Wearing method: wrist strapCompatible system: fully compatibleBattery capacity: 180mAOperation method: touchWristband material: siliconeColor: tape black, tape red and black, tape blue and black, tape pink and black, mesh belt blackPacking list:Smart watch x1