Xcsource Mini DVB-T Digital Satellite Signal Finder Strength Meter With Compass and Attenuation Control Function BI154 Compass With attenuation control function easily locate satellite signal. Corrosion-resistant connectors. In-line IF singal strength meter. Excellent sensitivity. Great for remote satellite antennas. Elegant exterior and convenient to carry. Certification: RoHS, CE. Eco-friendly Material.