遇溺警報系統  Poseidon drowning detection 

http://www.poseidonsaveslives.com/

https://www.facebook.com/Poseidon.fr

youtube 

https://www.youtube.com/channel/UCudDLKSpcrHSnUt9SGiMkxQ

https://www.youtube.com/watch?v=aR1h87sGZxs

https://baibai.com.tw/community/