This of course means you can make your Location significantly larger than the wifi range. These circles can be resized to quite a large area though, so I haven't found it to be problematic. You can't 'draw' a polygonal Location, so no squares or other funny shapes. If the device leaves or enters one of these areas, you will receive a push notification. Separately, in the app, you can define one or more *circular* areas on Google maps (right in the app) as "Locations". If the device leaves wifi range, it "wakes up" (uses more battery), but will not send alerts unless it leaves or enters a "Location" as described below. As noted above, as long as the device is within range of its wifi network (not sure if there can be more than one - I haven't tested - comments welcome), the device stays in battery-saving "sleep mode". The "Sleep Zone" is defined purely by wifi range. I let it sit for several hours and it never updated, however, once I removed the device from wifi range and brought it back into range, the firmware updated within minutes. You can dismiss the pop-up, and the device will still work, but every time you open the app you'll be reminded that 'it's working on updating firmware'. At this point, it's important that your wifi router is actually connected to the INTERNET because the device will attempt a firmware update (This part is interesting, so I'll expand: You'll know the device wants to update firmware by way of a pop-up in the app. Once connected via bluetooth, the app will prompt you to choose a WIFI network for the device to connect to and enter the password. I imagine you could theoretically set up the device with a friend's smartphone, add a phone number or email address for SMS/email notifications to a different device, and then delete the app. Once you download the app and create an account, it prompts you to connect via BLUETOOTH to the device. You cannot set up this device without a SMART PHONE (Android or iOS). When you open the box the are instructions that direct you to go to the app store to download the "Whistle 3" app. This device contains (at least) a battery, a GPS receiver, a bluetooth antenna, a wifi antenna, and a 3G antenna. Here's what I've learned about how it actually works: I didn't understand why (and didn't believe them), so I decided to risk it and bought it anyway. I contacted support to ask them if internet was required and three times they told me "yes". However, she doesn't have internet service where she lives, and I really didn't want to have to buy service just for this device to be able to stay in "sleep mode". This product seemed to fit the bill and was reasonably priced. Therefore, it had to be waterproof for showers, and because I don't want to drive there every day to charge it, must have long battery life. My mother has alzheimer's and I've been looking for a device I can attach to her that she can't remove, but will alert me when she leaves her assisted living facility 30 miles away from my home. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice. You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Customise Cookies’ to decline these cookies, make more detailed choices, or learn more. Third parties use cookies for their purposes of displaying and measuring personalised ads, generating audience insights, and developing and improving products. This includes using first- and third-party cookies, which store or access standard device information such as a unique identifier. If you agree, we’ll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie Notice.
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