【Product Name】 MACKIE HM-4 4-WAY HEADPHONE AMPLIFIER 【Condition】 • Tested and working: Outputs correctly on all channels, and the volume knobs function smoothly without any crackling. • Appearance: Beautiful condition with minimal signs of use. • Used only indoors and stored with care. • Cleaned with alcohol wipes. 【Included Accessories (See photo 2)】 • HM-4 unit • Original AC adapter • Outer box • Japanese Owners Manual • Quick Start Guide • Warranty card (※Details such as expiration date are unknown) 【Product Features】 A 4-channel headphone amplifier that allows you to listen to one stereo audio source with up to four headphones simultaneously. Each channel has independent volume control, making it very useful for band practice, video production, and recording. Despite its compact size, it has a "tank-like rugged" design, ensuring excellent durability. Please purchase only if you understand that this is a used item. Instant purchase is welcome! #MACKIE #Mackie #HM4 #HeadphoneAmplifier #HomeRecording #DTM #Recording