Functionality confirmed. Body only, no case. 【High-Quality Sound】 The BOSS CS-3 is a high-performance compression sustainer designed to enhance the sound quality of your guitar. It adjusts the dynamics of the sound, achieving a more uniform and rich tone. 【Multi-Function Controls】 Equipped with four control knobs: SUSTAIN, ATTACK, LEVEL, and TONE, allowing players to finely adjust the tone to their preference. This makes it compatible with various musical styles. 【Robust Design】 BOSS effects pedals are characterized by their durable design. They can be used with confidence in live performances, and are widely supported by professional musicians. - Brand: BOSS - Model Name: CS-3 - Type: Compression Sustainer - Input Terminals: INPUT - Output Terminals: OUTPUT - Control Knobs: SUSTAIN, ATTACK, LEVEL, TONE - Connection Terminals: 1/4 inch jack Thank you for viewing.