華為 睡眠 IOT

https://www.vmall.com/product/10086695633756.html

Sleepace享睡-享睡纽扣B501 白色（支持HUAWEI HiLink）
集合睡眠监测（体动参数）、睡眠改善建议的神奇睡眠小纽扣
价格：抢购价 ¥79.00 ¥ 129

The button uses battery,
It uses BLE to connect app.
When it works on pillow, it is not necessary to connect to app.
The battery can endure 60 days.

It is interesting.

https://www.vmall.com/product/10086479475993.html
Sleepace享睡-RestOn智能睡眠监测器 Z200
 非穿戴无感监测心率呼吸率、体动离床、睡眠周期，推送睡眠报告和改善建议，智能睡眠健康管家。

It is also interesting.
Its battery can last for 30 days.
it is a belt with thickness of 2mm and put under the bedsheet.
It can detest and record the sleep behavior.
It uses BLE to connect with app.