W21L is a wireless ultra-thin GPS tracker designed for long-term operation and easy concealment. With a large 5000mAh battery capacity and long standby time, it can run for 4 years in LBS one-day positioning mode and 3 years in GPS one-day positioning mode. The product’s 12mm thickness allows it to be safely hidden in vehicles, packages, and other valuables.
The device measures just 11.6mm thick — about 30% smaller than competing products in the same class. It can be easily concealed under car floor mats, beneath seats, or in other hidden locations, making it virtually undetectable.
Built-in motion sensor to wake up the device when moving, which helps to enable the emergency mode in a short time and protect the asset security.
Powered by industry-leading low-power LTE Cat-M / NB-IoT modules and an intelligent sleep-scheduling strategy, combined with a 5000mAh lithium-manganese-dioxide battery, the deep-sleep current drops to the μA level. Under the one-location-per-day mode, the device delivers an outstanding 5-year standby time, truly maintenance-free operation.
The battery can be replaced in 3 seconds without any tools — significantly reducing long-term maintenance costs for large fleets, and making asset management more flexible and economical
Ensures stable, low-power communication for real-time pet tracking — even in remote areas
W21L supports remote wake-up via SMS or platform, allowing real-time tracking even in sleep mode — no need to wait for daily updates.
Remotely upgrade the firmware quickly and easily.
The alarm is triggered when the light sensor detects that the device is removed.
Alarm when the built-in battery is low.
5000mAh battery, can be used for more than 5 years in default mode (one positioning per day).
| Model | W21L | W18L-U | S08L |
|---|---|---|---|
| Frequency Band | 4G only | 4G + 2G | 4G + 2G |
| Battery Capacity | 5000 mAh | 9600 mAh | 4200 mAh |
| Standby Time | 5 years | 9 years | 3 years |
| 3-Axis Accelerometer | Supported | / | / |
| Vibration Wake-up | Supported | / | / |
| Wi-Fi | Supported | / | / |
| Dimensions | 96×49.5×11.6mm | 92×63×36mm | 73×42×31mm |
| Replaceable Battery | Supported | Complex Disassembly | Complex Disassembly |
GPS tracking devices do not have a fixed operating range like radio transmitters. Instead, they rely on GPS satellites orbiting approximately 20,200 km above Earth to determine their location, which means they can work virtually anywhere on the planet with a clear view of the sky. However, to transmit the location data to your phone or computer, the device needs cellular network coverage (GSM/LTE) or a WiFi connection. In areas without cell coverage, the device can store location data locally and upload it once it re-enters a coverage area. LBS (Location-Based Service) positioning is also available as a fallback when GPS signal is weak, using nearby cell tower triangulation.
Tracking your assets with W21L is straightforward. First, install the device in or on your asset (vehicle, container, equipment, etc.) following the quick-start guide. Once powered on, the device automatically connects to the GPS satellite network and the local cellular network to begin transmitting location data. You can monitor your asset’s real-time position, view historical routes, set up geo-fence alerts, and configure reporting intervals through our web-based tracking platform or mobile app. The platform provides an intuitive dashboard with map visualization, speed reports, and customizable notifications. For fleet management, you can track multiple devices simultaneously and generate detailed analytics reports.
A GPS asset tracking device is a compact electronic device that uses the Global Positioning System (GPS) to determine and record the precise geographic location of an asset in real time. These devices are typically attached to vehicles, containers, equipment, or any valuable property that needs monitoring. Modern GPS trackers like the W21L combine satellite positioning with cellular communication (4G LTE Cat M1/NB-IoT) to transmit location data to a cloud-based platform, where users can access it via web or mobile applications. Advanced features include geo-fencing, movement detection, multiple operating modes, SMS wake-up, and long battery life. GPS asset tracking is widely used in fleet management, logistics, construction equipment monitoring, and anti-theft applications.
The legality of GPS tracking devices varies by country and jurisdiction. In most countries, it is generally legal to track assets you own, such as your own vehicles, equipment, or fleet vehicles. However, tracking another person’s vehicle or property without their knowledge and consent is usually illegal and may violate privacy laws. For commercial fleet management, employers are typically required to inform employees that vehicles are being tracked. In the United States, federal law does not explicitly prohibit GPS tracking, but many states have specific statutes regarding consent and notification. In the European Union, the GDPR (General Data Protection Regulation) imposes strict requirements on data collection and processing. Always consult local regulations and legal counsel before deploying GPS tracking devices to ensure compliance with applicable laws.
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