Auto Sleep mode saves battery (after 10 min of inactivity)

Buy at www.musicianscart.com NUX B-2 PLUS 4-channel Guitar Wireless System 2.4 GHz,Finish Black,Autonomy 20 hours max.,Category guitar wireless system,Frequency band 2.4 GHz,Transmission digital 2.4 GHz,Power supply Rechargeable lithium-ion battery,Frequency response 20 Hz 20 kHz,Accessories included usb cable,Dimensions (mm) 73 x 40 x 55,Weight (kg) 57 g,Latency 5 ms,Indicative range 15 m,Frequency scanner No,Max number of simultaneous systems 12,Additional specs Wireless transmitter and receiver pack,Format compatible with all types of guitars and basses,Very high definition 32 bit 44.1 kHz 2.4 GHz digital audio transmission,Signal transmission possible to several receivers simultaneously,Practical range 15 meters, up to 30 in open fields,Latency less than 5 ms,Autonomy up to 20h 7h in continuous use,Auto Sleep mode saves battery (after 10 min of inactivity),USB cable supplied for charging the 2 batteries