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.
Wake up the device from deep sleep mode remotely via SMS command. This allows you to activate tracking on demand without waiting for the scheduled reporting interval, making it ideal for assets that remain stationary for long periods. SMS wake-up works across all operating modes, giving you full control over when and how the device reports.
Measuring only 96 x 49.5 x 11.6 mm and weighing just 75g, W21L is one of the most compact 4G GPS trackers available. The optimized LED design prevents light leakage, while the enhanced GPS antenna ensures superior signal acquisition even in challenging environments. Built with SMT manufacturing consistency and an RF shielding cover for interference protection.
1
Also known as “Check-in Mode”. The device wakes up at scheduled intervals to report its GPS position, then returns to deep sleep. This mode maximizes battery life, making it ideal for assets that don’t move frequently.
Best for: asset storage, parked vehicles, long-term monitoring
2
Also known as “Anti-theft Mode”. When triggered (via SMS, call, or vibration), the device enters a high-frequency reporting state to provide real-time tracking. Designed for rapid recovery of stolen assets.
3
Also known as “Mileage Mode”. The device automatically detects movement via the built-in accelerometer and begins tracking the route. When the asset stops moving, it switches back to low-power mode. Perfect for route recording and trip accounting.
4
Also known as “Live Mode”. The device continuously reports its GPS position at short intervals, providing a complete real-time trajectory. Ideal for applications requiring constant visibility and live monitoring dashboards.
Monitor the real-time location and movement history of your vehicles, assets, and workforce. W21L provides accurate GPS positioning with GSM/LBS/WiFi backup to ensure you never lose track.
Protect your valuable assets with geo-fence alerts, vibration detection, and remote monitoring. W21L’s emergency mode activates frequent reporting for rapid recovery of stolen vehicles or equipment.
Optimize your fleet operations with route tracking, driver behavior monitoring, and fuel efficiency analysis. W21L supports multiple working modes to balance tracking accuracy with battery life.
Optimize and streamline your delivery process to drive efficiently.
Optional peripherals to monitor temperature and humidity to gain visibility into your operations and help save money.
Trigger an alarm when the device battery is about to run out of charge.
Near-zero installation：the tracker tightly and effortlessly fastens to most metal surfaces.
Instant alerts for atypical events such as car fault, overspeed, ignition detection, collision, geo-fence entry/exit, etc.
Using OTA technology doesn’t just promote security updates to be sent to devices. It also encourages new functionality to be rolled out.
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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