With separate in-ear components you can compose or expand your own personal in-ear monitor systems. In this category you'll find transmitters and receivers (beltpacks), with or without cables. The in-ear headphones can be found in a separate category. A complete in-ear system is at least equipped with a receiver, a transmitter and a pair of in-ear headphones. Please note: some systems operate on separate batteries while other systems operate on a battery that needs to be charged with a power adapter.