The Retevis RT97S is the compact, ultra-portable sibling to the RT97L. While it offers lower power output, it is highly prized for its “lunchbox” form factor and specialized connectivity options, making it a favorite for emergency kits, mobile “pop-up” repeaters, and hobbyist experimentation.
Specialized Connectivity (DB-9 Port)
The defining feature of the “S” model is the DB-9 data port. Unlike the standard RT97, this port allows you to connect external controllers. This opens the door for advanced hobbyists to link the repeater to the internet or to add a dedicated external identifier/controller for more complex logic.
Ultra-Portable "Lunchbox" Design
At less than half the weight of the RT97L, the RT97S is designed for maximum mobility. It fits easily into a backpack or a small pelican-style case. It is frequently used as a “deployable” unit for search and rescue operations or weekend camping trips where a permanent tower isn’t feasible but immediate group coverage is needed.
Multi-Source Power Flexibility
The RT97S is highly efficient and designed to run on a wide range of DC voltages (12V–24V). It comes standard with both a 110V/220V AC adapter and a 12V/24V car cigarette lighter plug. Because of its lower power draw compared to the 25W RT97L, it is an excellent candidate for small-scale solar setups or portable battery banks (like a Jackery or EcoFlow).
Integrated LCD Interface
The front-facing LCD provides “at-a-glance” status updates, including current channel, RX/TX frequencies, and CTCSS/DCS tones. The simple keypad allows for quick channel switching in the field without needing to tether the unit to a laptop for basic adjustments.
The Verdict
The Retevis RT97S is the go-to choice for GMRS users who prioritize portability and connectivity over raw power. While the RT97L is a “powerhouse” for permanent outdoor installation, the RT97S is the “Swiss Army Knife” for mobile operators and those who want to experiment with internet-linked repeater systems.
