The equalizer knobs are all missing. A handmade cover will be included. The battery is sold separately, and seems to be available for around 3,000-4,000 yen. I've been using it regularly, so it produces a powerful, rich sound without any issues. Please refrain from purchasing if you are concerned about scratches or discoloration. Recent Specifications: ■ Bass Amplifier, Combo Type ■ Color: Black ■ Output: 100W (RMS) ■ Speakers: 5" x 2 Custom Piranha Loudspeaker ■ 5-band graphic equalizer ■ Effects: COMPRESSOR & LIMITER with ON/OFF switch ■ Input: Active/Passive switch (input level) ■ Output: Preamp out, DI out, Headphone out, EX speaker out ■ Dimensions, Weight: 368H x 165W x 400D)mm, 14kg ~From the manufacturer's website~ ■ The BRIEFCASE is designed as a high-performance practice amp that doesn't limit the player's imagination, and despite its compact appearance, it outputs a rich and deep tone. The dynamic mid and high frequencies are output from two 5-inch (approx. 12.7cm) speakers and a 100-watt (RMS) amplifier section designed specifically for the BRIEFCASE. It can be powered by AC power or battery, making it very flexible for both the player and the environment. This small, clean, and powerful amp brings out the natural sound of the instrument, and is also recommended for upright bass.