They use 2xCR2032 batteries which are included and are already installed<br>These batteries are replaceable<br>Quantity: 12 pcs<br><br>Worldwide shipping, item will be shipped with tracking number, 1 day Fast Processing & handling.<br /></p> <br /></p><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/55a7441266a0734083971b9d-1-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/55a7441266a0734083971b9d-2-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><img src="https://contestimg.wish.com/api/webimage/55a7441266a0734083971b9d-3-original.jpg" alt=""width="800" noproxy><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;"><p style="text-align: center;">