{"dataset":"MainBuyer UK price observations","market":"GB","market_name":"United Kingdom","methodology":"Each observation is stored only when MainBuyer has a timestamped checked retailer offer. Missing days are not interpolated or invented. Historical low, high and median figures use recorded in-stock observations only.","observations":[{"currency":"GBP","in_stock":true,"observed_at":"2026-09-20T08:49:12+00:00","price":"369.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0CHF6Z393?maas=maas_adg_api_587917621439044438_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB86d049c9b3545c5c7a1612d2992e400d&aa_adgroupid=6a03871ec4c8ed7af020ec3b18b23710_PBSEP_!!!affid!!!_118045_&aa_creativeid=c51eDYuDGmbDJqx8ffohIwVz_aweje856idCYBSQwC0LIA8o_c"},{"currency":"GBP","in_stock":true,"observed_at":"2026-09-19T08:17:49+00:00","price":"369.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0CHF6Z393?maas=maas_adg_api_587917621439044438_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB86d049c9b3545c5c7a1612d2992e400d&aa_adgroupid=6a03871ec4c8ed7af020ec3b18b23710_PBSEP_!!!affid!!!_118045_&aa_creativeid=c51eDYuDGmbDJqx8ffohIwVz_aweje856idCYBSQwC0LIA8o_c"},{"currency":"GBP","in_stock":true,"observed_at":"2026-09-18T08:29:54+00:00","price":"369.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0CHF6Z393?maas=maas_adg_api_587917621439044438_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB86d049c9b3545c5c7a1612d2992e400d&aa_adgroupid=6a03871ec4c8ed7af020ec3b18b23710_PBSEP_!!!affid!!!_118045_&aa_creativeid=c51eDYuDGmbDJqx8ffohIwVz_aweje856idCYBSQwC0LIA8o_c"},{"currency":"GBP","in_stock":true,"observed_at":"2026-09-17T12:29:34+00:00","price":"369.99","retailer":"Amazon UK","source_kind":"offer_check","source_url":"https://www.amazon.co.uk/dp/B0CHF6Z393?maas=maas_adg_api_587917621439044438_static_12_201&ref_=aa_maas&tag=maas&aa_campaignid=PB86d049c9b3545c5c7a1612d2992e400d&aa_adgroupid=6a03871ec4c8ed7af020ec3b18b23710_PBSEP_!!!affid!!!_118045_&aa_creativeid=c51eDYuDGmbDJqx8ffohIwVz_aweje856idCYBSQwC0LIA8o_c"}],"product":{"brand":"Ultrahuman","evidence_url":"https://mail.mainbuyer.com/evidence/products/ultrahuman-ring-air-smart-ring-track-sleep-hrv-stress-no-subscription-b0chf6z393/prices","gtin":null,"id":11474,"model_number":null,"name":"ULTRAHUMAN Ring AIR Smart Ring -Track Sleep, HRV & Stress, No subscription","product_url":"https://mail.mainbuyer.com/product/ultrahuman-ring-air-smart-ring-track-sleep-hrv-stress-no-subscription-b0chf6z393","urn":"MB-AWIN-GB-B0CHF6Z393"},"summary":{"currency_code":"GBP","currency_symbol":"\u00a3","has_history":true,"historical_high":"369.99","historical_low":"369.99","last_observed_at":"2026-09-20T08:49:12+00:00","low_30d":"369.99","low_90d":"369.99","median_price":"369.99","observation_count":4,"priced_observation_count":4,"retailer_count":1,"span_days":3,"tracked_since":"2026-09-17T12:29:34+00:00"}}