The ATNJ JS-DB900/1800/2100/CAR is a professional tri-band mobile signal booster specifically designed for camper vans and vehicles. This 4G/LTE, GSM, and 3G signal amplifier features a powerful Yagi antenna system that provides reliable connectivity for camping and mobile applications.

• Intelligent LCD display for guided installation
• Real-time signal strength monitoring
• Automatic dormancy when no calls are active
• Self-diagnostic system with error alerts and solutions
• Automatic gain adjustment to prevent system oscillation
• Device status monitoring with proactive maintenance alerts
• Powerful Yagi antenna for enhanced signal reception
• Supports multiple simultaneous connections
• Easy installation via cigar lighter power source

This tri-band signal booster provides extended coverage up to 10 square meters, making it ideal for camper vans and mobile applications. The system enhances GSM, 3G, and 4G/LTE signals across 900MHz, 1800MHz, and 2100MHz frequency bands, ensuring stable mobile internet and high-quality voice services even in remote locations.

The complete installation kit includes: booster unit, in-car antenna, powerful outdoor Yagi antenna, all necessary cables and mountings, and comprehensive user manual with step-by-step installation guide.

All ATNJ signal boosters are certified 100% safe for users, mobile devices, and the environment. This model carries CE and RoHS international safety certifications, ensuring compliance with global standards.

This product includes a 3-year warranty with 24/7 technical support. The device is backed by comprehensive customer service and installation assistance.