AMNVOLT SI4732 TEF6686 Dual-system Full-Band Radio FM AM SSB Air Band Receiver + TEF6686 FM Receiver 2-in-1 Handheld Rad
Note 1 The SI4732 system is a customized version based on Russian firmware To ensure firmware compatibility with multiple hardware devices the developers have displayed all buttons by default on the page However not all buttons in the system will actually be functional different devices may support different functions If a button is grayed out it means that the function is not supported which is normal Please do not modify the device firmware yourself 2 Do not use adapters with unstable current as this may damage capacitors and prevent the machine from powering on Description The ESP138 is a dual system radio utilizing the TEF6686 system open source project and the ESP32 SI4732 system architecture It integrates the TEF6686 chip with high fidelity Bluetooth functionality offering exceptional selectivity and ultra high sensitivity The SI4732 supports Air Band AIR and Single Sideband SSB as well as Bluetooth 5 0 dual mode Equipped with a 2 4 inch touchscreen numeric keypad large capacity battery and aluminum alloy body it offers both professional reception and portability Specification Controller ESP32 WROOM 32UBluetooth JL high performance chipScreen 2 4 inch IPS touchscreen 320x240 Speaker 40mm full range speakerAntenna Built in 820mm telescopic antennaExternal antenna port 3 5mm external antenna portBattery 3 7V 2500mAh lithium polymer batteryInterface Type C 5V 2A charging supports data upgrades Casing Material Aluminum AlloyDimen