CM4 Box-type Portable Anti Tracking GSM GPS Jammer for Car

The CM4 Portable Anti Tracking GSM GPS Jammer for Car is built for users who need a practical way to stop unwanted tracking without carrying oversized equipment. Instead of focusing on extreme output power, this model delivers targeted interference in a compact, easy-to-deploy format, making it ideal for everyday vehicle use.

By combining multi-band suppression with a built-in antenna system, CM4 creates a controlled protection zone that disrupts tracking signals quickly and consistently.

Multi-Band Anti Tracking Device Coverage

CM4 is engineered to block the most commonly used tracking frequencies found in modern devices. It works effectively against both traditional and newer tracking systems.

• GSM communication signals used by tracking devices
• GPS L1 positioning signals
• GPS L2 enhanced tracking frequencies
• CDMA-based tracking systems

This ensures that both standalone GPS trackers and GSM-enabled tracking units are unable to transmit or receive positioning data within the active zone.

Portable GPS Jammer with 10–15 Meter Effective Range

The integrated omnidirectional antenna generates a stable interference field around the device. This creates a uniform signal blocking radius suitable for real-world environments.

• Effective coverage: approximately 10–15 meters
• Consistent signal suppression in all directions
• Suitable for cars, garages, and confined spaces

Rather than relying on exaggerated range claims, CM4 focuses on reliable short-range performance where tracking prevention is actually required.

Smart Cooling Design for Stable Continuous Operation

To maintain consistent performance, the device features an internal cooling structure designed for extended use:

• Built-in cooling fan
• Ventilation airflow design
• Heat dissipation components

This setup helps prevent overheating and ensures stable output during operation.

Portable Car Jammer with Built-In Battery

CM4 is designed for mobility and flexible deployment:

• Built-in 12V / 4Ah lithium battery
• Up to approximately 80 minutes of continuous use
• Supports extended operation via car charger

With a weight of just 0.5 kg, the unit is easy to carry and can be used without drawing attention.

If you prefer a smaller and more discreet solution, consider buying a mini USB-based jammer model for enhanced concealment.

One Touch GPS Jammer with Simple Controls

CM4 is designed for immediate operation without complex setup:

• Single-button power control
• LED indicators for working and charging status
• No configuration required

Once powered on, the device begins blocking signals instantly.

Technical Specifications

• CDMA: 851–894 MHz
• GSM: 925–960 MHz
• GPS L2: 1200–1300 MHz
• GPS L1: 1570–1620 MHz
• Output Power: ≥ 30 dBm per band
• Total Output Power: up to 4W
• Effective Range: 10–15 meters
• Battery: 12V / 4Ah Lithium
• Operating Time: approx. 80 minutes
• Dimensions: 215 × 43 × 90 mm
• Weight: 0.5 kg

Typical Use Cases for Car Anti Tracking Jammer

• Vehicle privacy protection during daily driving
• Blocking GSM and GPS tracking attempts
• Reducing location data exposure in sensitive situations

Package Contents

• 1 × CM4 BOX GPS Blocker
• 1 × AC Power Adapter