ACUS is a brand specializing in acoustic equipment with over 40 years of history in Italy. The main unit is in beautiful condition with no noticeable scratches. There are no operational problems. The items for sale are the main unit + power cord + instruction manual (English copy) + carrying case. Regarding the built-in battery, we have confirmed that it can be used for about 2 hours on a full charge. (The battery is a consumable item and is not guaranteed) It can be used without any problems with AC power. Please consider this hard-to-find model. - Features - ONE forstreet is the first battery-powered acoustic amplifier in the ACUS One series. With its built-in battery, it delivers high-quality performance unique to the ACUS ONE series in environments without a main power supply. It boasts top-of-the-line audio quality in Italy, a compact size, and high energy efficiency (over 7 hours of operation on a full charge). It also features two inputs (1 microphone line, 1 line), gain/volume control, a 3-band EQ, effect send and master volume, and an AUX input terminal, allowing connection to PCs and smartphones. Excellent design with a wood chassis. Clear sound quality with high reproducibility. Handmade acoustic amplifier made in Italy. Battery-powered for outdoor use. SPEC Frequency response: 60 Hz – 20 kHz Max Power out: 80W rms System format: 1 way amp Sensitivity: 92 dB SPL Max: 108 dB Woofer size: 6" Tweeter: Compression tweeter Box: 2 way bass reflex Construction: wood Weight: 15 Kg Dimensions: height: 36.5 cm × width: 26.4 cm × depth: 29 cm