The LSP 500 PRO is a wireless battery two-way audio system for professional use. It has been designed to address audiences at indoor and outdoor events without the need of any power or audio cables. The LSP 500 PRO allows you to install up to three receivers for wireless microphones. You can also play music wirelessly via a Bluetooth connection. Alternatively, you can use the integrated media player to play music from your USB storage device. For larger events you can send the sum signal of one LSP 500 PRO via a wireless transmitter to other LSP 500 PRO devices. The LSP 500 PRO is remote controllable via iPad App or Windows Remote Control Software, which serves as a mixing console and permits the control of up to 20 LSP 500 PRO simultaneously.