NU-X Stageman II Charge, 80W Battery Powered Acoustic Guitar Amplifier with Digital FX 2-Channels with Routing Adjustable Post-effects The NUX Stageman II rechargeable amplifier is the perfect companion for an acoustic-electric guitar when you want to be able to perform anywhere and be heard loud and clear without having to haul around a bunch of gear. With a large capacity lithium battery, the Stageman II is ready for as long as 4 hours outdoor performing for any musician. Specifications: 80 watts rich warm sound acoustic amp with 6.5” premium speaker and 1” tweeter - 80 Watts with Power Supply (Included) - 40 Watts with Rechargeable Battery (Built-in) 2 independent channels with routing adjustable post-effects Speaker: 6.5" Woofer with 1" Tweeter Acoustic Impulse Response Battery power for 4.5 hours outdoor performing Battery Charging Time: 6 hours (approx. @current: 1A) Drum & Loop (60s phrase loop) Bluetooth Audio Stream Free APP controller USB firmware update Dimensions: 310mm (L) x 280mm (W) x 328mm (H) Weight: 7.5 kg