Based in Osan-si, South Korea, WiSoL CO.,LTD. commenced operations in 2008 as a... Based in Osan-si, South Korea, WiSoL CO.,LTD. commenced operations in 2008 as a producer and supplier of specialized electronic components within the South Korean market. Their comprehensive product line features surface acoustic wave (SAW) filters, duplexers, and various other modules. The company also provides single and dual filters, multiplexers, radio frequency (RF) modules, ceramic actuator modules, and sophisticated touch feedback sensors.