Dear friend, thank you very much for your feedback on our 3 channel ECG SUN-6031. We will keep on supplying with high quality products at very competitive price and great service. Wish we could do more business with you in the near time, thank you !

Dear friend, thank you very much for your feedback on our handheld pulse oximeter SUN-70H. We will keep on supplying with high quality products at very competitive price and great service. Wish we could do more business with you in the near time, thank you!