Description: Name: Upper arm blood pressure monitor Brand: JZIKI Size: 126mmL*100mmW*53mmH Blood Pressure: 20-280mmHg Pulse Rate: 40-165 times/min Storage Memory: Double 99 group memory Pressurization: Automatic Pressurization Mode Cuff Size: 22-32cm Power: AAAA batteriesnot included/usb charging Adaptor: No adapter Backlight: 3 color backlight for choose Voice Function: English Voice or No Voice for choose Specifications: What is backlight mean? It means it has backlight always when measuring. In this way, you can see the screen clearly even on dark. And see more clearly on day time. Also, if your blood pressure is high, the screen show red. if your blood pressure is slight high, the screen show yellow. If your blood pressure is normal, the screen show green. Compared with No backlight model, it is more easier to see the result especially for elder people. What is English Voice And NO Voice mean? It means, it has live English voice or NO voice during the whole measurement. It will tell us how to take measurement and the result. If you do not want the voice, it can also turn off. Please choose you need English voice or NO voice when ordering. Package Included: 1x Blood Pressure Monitor