The RF Explorer 4G COMBO+ is a compact and powerful handheld spectrum analyzer offering continuous frequency coverage from 50 kHz to 4 GHz, with optional firmware expansion up to 5.1 GHz. Designed with a robust metallic enclosure and sleek varnished finish, it delivers high sensitivity for both indoor and outdoor RF measurements. An internal LNA amplifier and selectable attenuator provide excellent signal detection across a wide dynamic range, while PRESET configuration and dedicated HELP/SET buttons ensure fast and intuitive operation. It fully supports all HAM bands, making it an excellent choice for amateur radio operators and RF professionals alike.

Pocket-sized and lightweight, the device features multiple analyzer modes including Peak Max & Hold, Normal, Overwrite, and Averaging for versatile signal analysis. A high-capacity internal lithium battery provides over 10 hours of operation with convenient USB recharging. Multi-platform software and an Open Source API enable remote control, data logging, and high-resolution graphical display. Compatible with accessories such as the RF Explorer Holder SLIM and Near Field Antenna Kit, the RF Explorer 4G COMBO+ delivers reliable, flexible, and high-performance RF analysis for both professional and hobbyist applications.