Another smoke alarm company, Kidde, has developed a subscription-based service that charges users in the US $5 (£3.71) per month for access to a fire monitoring service linked to the Ring doorbell app. "Trained agents can request emergency help and alert a customer's emergency contacts in the event of an alarm," explains Kidde on its website.
（新华社北京2月25日电 记者朱基钗、胡浩、丁小溪、高蕾、胡梦雪）
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Цены на нефть взлетели до максимума за полгода17:55