The ASL 557-3 ATOM Bluetooth Wireless Switch Receiver is intended to be used for Bluetooth wireless access to communication devices, TECLA Shield, TECLA E, or switch interfaces on a computer. The USB side plugs into a communication device directly, or into a computer. Each plug corresponds to the pad on the head array (forward, right, or left). You can connect the plugs to the scan and select ports of a communication device, switch interface or TECLA ports. If using with the TECLA products, you need a rechargeable battey.