Privacy & cookie notice
Short version: this site does not track you, does not profile you, and does not sell anything to anybody. The only thing it remembers is which language you chose.
What is stored in your browser
| Name | Type | Purpose | Lifetime |
|---|---|---|---|
| sa_lang | localStorage | Remembers the language you selected so the site does not switch back on your next visit. | Until you clear it |
| sa_autosw | sessionStorage | Stops the automatic language redirect from repeating during the same browsing session. | Until you close the tab |
There are no advertising cookies, no social-media pixels, no cross-site identifiers and no analytics profile on this website. Nothing in the table above leaves your device.
What we do not do
- We do not run third-party advertising or remarketing.
- We do not build a behavioural profile of your visit.
- We do not embed external fonts, scripts or videos that would pass your IP address to another company.
- We do not sell, rent or share contact details with anyone.
Contact forms and e-mail
The contact form on this site does not submit data to a web server. It assembles an e-mail message inside your own device and hands it to your e-mail client. Nothing is transmitted until you press send in that client, and the message then arrives as ordinary e-mail. If you write to us, we keep the message only for as long as it takes to answer the question and to keep a record of the technical exchange.
The address on the contact page is assembled by your browser at display time rather than written into the page source, which defeats the automated harvesters that collect addresses from contact pages. That is why it appears as a link rather than as plain text.
Your rights
If you are in the European Economic Area, the United Kingdom, Switzerland, Brazil, California or any other jurisdiction with data-protection legislation, you may ask us what personal data we hold about you, ask for it to be corrected or deleted, and object to its processing. Because we hold almost nothing — the content of e-mails you have chosen to send us — a request is usually answered within a few days.
Security
Traffic to this site is served over HTTPS. The site is a set of static files: there is no database, no login and no user-generated content, which removes most of the usual attack surface.
Changes to this notice
If we ever add a feature that changes what is stored — a newsletter, for example — this page will be updated before that feature goes live, and the change will be dated.
How to contact us about privacy
Write to the address on the contact page, marking the subject line “Privacy”. Postal enquiries: Shenzhen AlertField Intelligent Technology Co., Ltd., Shenzhen, Guangdong, China.