Jumper T20 V2 ELRS Gemini

Jumper T20S V2 is a high quality radio with EdgeTX firmware and 1W ELRS Gemini module. The Jumper T20S is the ideal choice for those looking for a small radio without compromise. The radio is 185x188x68mm in size, which is noticeably smaller than the Boxer or TX16. Even at this size, however, it uses large RDC90 gimbals. As with the larger radios, the Jumper T20S V2 will provide 6 switches, 6 potentiometers. There are six adjustable buttons. There are also joysticks on the radio for trim settings, but these can be reconfigured and used as additional switches. For ease of transport, it has a folding swivel antenna. All information is displayed on a 1.3" OLED display. A great advantage is the integrated memory that replaces the classic SD card, which greatly increases the reliability of the radio.

On the back we find an active cooling for the ELRS module. The power supply is also worth mentioning. The shaft can accommodate two Liion batteries (not included). The radio has a shaft for the larger 21700, which will noticeably extend the battery life. The batteries are conveniently charged via a USB-C connector.

The radio's big advantage is the aforementioned integrated ELRS Gemini module with a power output of up to 2x 500mW and a refresh rate of up to 1kHz. The Gemini module contains two transmit chips and two antennas in one, which will excel when combined with full diversity receivers (those that contain two receive chips). In Gemini mode, the ELRS transmits and receives on two channels simultaneously. As a result, Gemini will offer more reliable RC transmission, more robust to interference and more stable LQ.

The Jumper T20 Gemini uses the more premium RDC90 gimbals just like the Jumper T20S. Version 2 primarily uses active cooling and a more powerful processor.

V1 review by OscarLiang