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I hope this message finds you well. We're currently having some issues with our device, specifically with the spo2 and ekg functions. It's been a reliable piece of equipment for us, and we've thoroughly enjoyed using it, so it's a bit concerning that these features are no longer working. We've attempted various troubleshooting methods but haven't had any success in resolving the issue. I'm reaching out for assistance, as we could really use some guidance to get everything back in working order. Any help you could provide would be greatly appreciated. Thanks!