Sound and light warning function. Warning temperature can be set according to practical needs.

声光报警功能，并可根据需要对各仓的报警温度进行设定。

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In order to avoid such accident, a warning system using passive infrared target detection was developed. It can search body targets in the mine cars and give sound and light warning as well.

为了避免此类事故，根据红外检测原理研制了被动式红外探测报警系统，以此对矿车里的人体目标进行检测，并作出声、光报警。

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Suddenly a warning light blinked.

突然有一盏警告灯开始闪烁。

《牛津词典》

We loved a feature where the rear view mirrors displayed a little orange light, warning us when an object was in our blind spot.

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Last month the Commons Education Select Committee issued a damning report into the plans, which it described as a "red light" warning over the changes.

BBC: Q&A: Changes to the teaching of key subjects

Last week a report from the Commons Education Select Committee issued a "red light" warning to the government, urging it to slow down and rethink its proposed changes to GCSEs and the exam system.

BBC: Planned switch from GCSEs to Baccalaureate in England 'abandoned' - BBC News