Blood Pressure Monitors features: Automatic digital blood pressure monitor upper arm lcd blood pressure monitors with english voice home bp heart rate pulse meter(En1-with Plug) Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Colour: En1-with plug Product Information Name: Upper arm blood pressure monitor Size: 126mm(L)*100mm(W)*53mm(H) Blood Pressure: 20-280mmHg Pulse Rate: 40-165 times/min Storage Memory: Double 99 group memory Pressurization: Automatic Pressurization Mode Cuff Size: 22-32cm or 22-48cm for choose Power: AAAA batteries(not included)/usb charging Adaptor: Included Euro/AU/US/UK adaptor according to countries Backlight: 3 color backlight Voice Function:English Voice 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 mean? It means, it has live English 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 it off. Advantage 1; We have sell this product in China for more than 15 years and it is really great It is China famous brand, golden quality We have sell in Aliexpress for more than 7 years. 2; We now upgrade the goods We provide 3 color model with backlight and English voice . 3; We also add big cuff 22-48cm option for those people who need large size cuff tonometer to watch their health. Health is really important for us And a good tonometer will help a lot Give it to our loved ones