Core Viewpoint - The article highlights the growing concern among families regarding the safety of elderly and children who may get lost, leading to a significant market for various tracking devices and technologies [2][3][4]. Group 1: Market Demand and Trends - The anxiety about losing loved ones has created a large market for tracking devices, with sales of elderly locators reaching thousands or even tens of thousands on platforms like Taobao [5]. - According to the 2020 "China Missing Population White Paper," approximately 1 million people go missing each year in China, averaging about 1,370 elderly individuals lost daily [3]. Group 2: Technology Overview - The article discusses various technologies used in tracking devices, including satellite navigation, base station and WLAN positioning, Bluetooth networks, and Ultra-Wideband (UWB) technology [9][10][14][21][33]. - Satellite navigation, such as China's BeiDou and the US GPS, is the most common method but has limitations in urban areas due to signal obstruction [10][13]. - Base station positioning (LBS) can cover areas where satellite signals are weak, but its accuracy varies significantly depending on the density of base stations [20]. - Bluetooth technology can provide high-precision indoor positioning but relies on the installation of beacons [21][30]. - UWB technology offers centimeter-level accuracy and can indicate specific directions, making it effective for close-range tracking [33][39]. Group 3: Product Recommendations - The ideal anti-loss device should combine UWB, satellite, base station, WLAN positioning, and a one-button call feature, although such a product is currently unavailable [42]. - Smartwatches and wristbands primarily use satellite and base station positioning, offering convenience but limited battery life [44]. - Tracking tags like Apple AirTag utilize Bluetooth and UWB for precise location tracking but lack two-way communication capabilities [44]. - Other products, such as positioning shoes and bags, may be discreet but often have practical limitations [44]. Group 4: Practical Applications - A recommended strategy for families is to use a combination of a smart wristband for macro tracking and a UWB-enabled tag for precise location finding in close proximity [51]. - The article emphasizes the importance of understanding the underlying technologies to make informed decisions when selecting tracking devices for loved ones [48].