1. Material: ABS/latex/sponge 2. Size: Length 45CM, outer diameter: 10mm, inner diameter 6mm 3. Weight: 94.1g 4. Battery: button battery AG13 x 1 5. Record the use of exercise time 6. Calculate calories burned by exercise 7. Record the number of exercises 8. Expand your arms left and right, burn arm fat, and easily get rid of butterfly arms 9. Automatically turn off the screen, save power and worry, you can wake up when you use it again
