“MARINE PUBLIC ADDRESS SYSTEM
MAKER: HANGZHOU HUAYAN DIGITAL ELECTRON CO. LTD
MODEL: YKQ-1Z
S/N: 10E130114” “Potentiometer, Model No: WTH 118-1A,Rating: 2W 22K
WTH118-1A series potentiometer for resistance input or voltage regulator” HANGZHOU HUAYAN DIGITAL.YKQ-1Z.NA