This part is a kind of semiconductor called DRA818V.

Function of this product has VHF Band Voice Transceiver Module.

Manufacturers : Dorji

Image and pinout :

Some of the text 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 [ ... ]

DRA818V PDF Datasheet Download