SBS, for the first 4K OBVan in Korea, has selected LaON LT750 system, the newest and high range wireless intercom system. The system offers wired-like audio clarity with up to 7.2KHz audio frequency and supports 10 RBS repeater connection, and the Belt Pack can be in master mode. It has been 3+ years since SBS became LaON LT550 system users. There are many who have not yet experienced LaON 5GHz intercom but no one who has used it just once.