- Optimus.Co.,Ltd.
- AM tuner for car stereo,AM/FM combined tuner for car stereo(1 pack for car stereo),Front end for car stereo,RF-module,HD Radio,FM tuner for car stereo.
- Address:Sangdaewon-dong,Sangdaewon-dong ,Jungwon-gu, Seongnam-si
- Glospot
- Bluetooth, Sensor, Module, Edlc, Thermistor, Thermal Cutoff, FM Tuner, UV Sensor, Detector, Saw Filter.
- Address:Changup Boyuk Center, Kicet, 233-5 Gasan-Dong, Guemcheon-Gu
- Es Technology Co.,Ltd.
- AM/FM Tuner Block,FM Tuner,FM Tuner,FM Tuner,AM/FM Tuner Block,FTE-Series,FTC-Series,FTA-Series,FMC-Series,FMP-Series,FTM-Series,AM/FM Tuner Block.
- Address:Wonji-ri,Wonji-ri ,Juchon-myeon ,Gimhae-si
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