My product wireless system for Roland GR 55, GR 33, etc., compatible with all products synth. Roland. The system transmits six strings. main guitar signal to be adopted in the receiver. For the main guitar signal is particularly box on two AA batteries. Facility is on two AA batteries. The transmitter still cordless battery that supplies the active electronics in the sensor and it must be recharged. Soon there will be a new video and a few pieces will be available on the ebay.