PAW-90X PAW-90x was produced using the latest SMT machine, high stability. PAW-90x is provided with a permanently installed rechargeable battery, which can be used continuously for 8 hours. PAW-90x can be used with the recharger cable if the battery runs out. Tone control is designed for the best tone output. Echo control designed for karaoke. VHF (170MHz-174MHz)frequency with low interference, Crystal Oscillator circuit, frequency is stable for excellent reception. Compact, lightweight 4lbs. Unit with carry-along handle for complete mobility and portability. Signal output receptacle allows for easy connection to high powered amplifiers, recorders and large speaker boxes. Receiver has hidden compartment for power cord and transmitter for neat storing and comfortable carrying. Ten FCC approved channels available for multi unit/station use within same facility.