Fangrui Product Details Convenient Usb Charging: This Device Comes With A Usb Data Line That Makes It Easy To Recharge Whenever And Wherever You Need To. Whether Youre Or , You Can Keep Your Music Going Without Worrying About Running Out Of Power. Flexible Adjustment: This Device Is Designed To Be Adjusted To Fit Your Needs Perfectly. With A Flexible Range, You Can Adjust The Angle To Suit Your Playing Style Without Affecting Your Rhythm Or Performance. Versatile Compatibility: This Device Is Suitable For Use With A Wide Range Of Electric Musical Instruments, Including Electric Guitars, Basses, Drums, And Violins. No Matter What Type Of Instrument You Play, This Device Can Help You Connect With Your Audience And Take Your Music To Level. Specification: Material: Abs Product Color: Black Frequency Range: Uhf Frequency Broadband: 20hz-20khz Transmission Delay: Less Than 4ms Battery Type: Rechargeable Lithium Battery 3.7v 600mah Charging Interface: Micro-usb Charging Time: 2 Hours Usage Time: 4 Hours Product Size: About 110x43x17