GUTA RV Solar Tire Pressure Monitoring System — 6-Sensor Kit (M20)

The M20 is a 6-sensor external-cap TPMS designed for RVs, trailers, and trucks, with a solar-charged LCD display that also accepts 12V power and shows real-time pressure and temperature for all six tires simultaneously. The sensor range is rated at 36 feet without a repeater, which is marginal for longer RVs or tractor-trailers. The FCC ID database search for this specific M20 model returned no confirmed match; the manufacturer (Shenzhen Hanyang Semiconductor) does have a TPMS sensor registered under grantee code 2BDEB, but the model designation does not clearly map to the M20. The product is currently unavailable on Amazon as of this review.

This kit suits owners of shorter RVs, single-axle trailers, or work trucks who want a driveway-installable system with no shop visits, a solar-powered display that needs no charging cables, and a 0–188 PSI pressure range covering standard trailer tires. Skip it if your vehicle is longer than 36 feet end-to-end — without the separately sold repeater, rear-axle sensors will likely drop signal. If you need confirmed FCC-certified hardware or pressure accuracy verified against a reference gauge, other external-cap kits in this category offer more documented evidence on both fronts.

An FCC Part 15 search for the GUTA M20 returned no confirmed match in the fcc.gov database as of 2026-05-23; the manufacturer (Shenzhen Hanyang Semiconductor) holds a TPMS sensor grant (2BDEB-GS, 433 MHz) but the M20 model number is not explicitly tied to that record. No AC charger is included with this kit — power is solar or 12V — so no AC electrical safety certification concern applies. No active CPSC recall was found for GUTA brand products as of 2026-05-23. CR1632 sensor cells and the display's internal backup battery should go to a Call2Recycle drop-off or municipal household hazardous waste facility at end of life, not household trash.