Before flashing any "OTP" software, always dump your current firmware to a USB drive. Flashing the wrong board version can brick your receiver.
Support for external Wi-Fi antennas, typically using the RT5370 or MT7601 chipsets. Key Features (2021 Update)
The "Dvbs-1506tv-v1.0-otp" refers to a specific firmware version for digital satellite receivers utilizing the Sunplus 1506TV