SHOP › Omron RS4 Wrist Blood Pressure Monitor Image 1 of 2 Image 2 of 2 Omron RS4 Wrist Blood Pressure Monitor £45.21 Sold Out Omron: Rs4 Wrist Blood Pressure Monitor. Genuine product. Free UK delivery. Sold Out Added! Omron: Rs4 Wrist Blood Pressure Monitor. Genuine product. Free UK delivery.