DRA818V PDF datasheet can download.
This product has VHF Band Voice Transceiver Module functions.
This is one of the semiconductor types. This part name is DRA818V.
Manufacturers of the product is Dorji.
Image and pinout :
Some of the text files within the PDF file
DRA818V VHF Band Voice Transceiver Module Features: Frequency Range: 134~174MHz Tx/Rx frequency independent Channel space: 12.5/25KHz Configurable multi-channels Sensitivity: -122dBm Output power: +27/30dBm CTCSS / CDCSS codes 8 volume levels 8 squelch levels UART interface Temperature: -20°C ~+70°C TX current: 450/750mA Supply voltage: 3.3~4.5V DRA818V V1.21 Applications Portable walkie-talkie Outdoor sports products Audio monitor system Building security system DESCRIPTION DRA818V is a type of compact wireless voice transceiver module based on RFIC RDA1846 and works in VHF band. It integrates high speed microcontroller, high performance wireless transceiver IC, high power PA, audio process and squelching circuits. It provides standard UART interface which users can easily configure appropriate parameters for different applications. Users can easily construct a walkie-talkie system by connecting microphone, audio [ … ]
Please refer to the file for details.