Mackie HM-4 4-Way Headphone Amplifier 100789747 Power supply Microphone: 2 AA

Power supply Microphone: 2 AA size batteries

Media and file systems

Its spring-steel wire-mesh front grille protects the transducer from the hardships of on-stage use

Built-in Control Panel: 8 buttons for menu control

Range: Selects either +/- 6dB or +/- 12dB

Mackie HM-4 4-Way Headphone Amplifier 100789747 Power supply Microphone: 2 AAMackie HM 4 4 Way Headphone Amplifier The ultra compact HM 4 4 Way Headphone Amplifier features a 1 4" stereo input and four 1 4" headphone outputs with individual level controls. Perfect for studios or even at home when up to four people want to listen together. Features: Share a single stereo source with up to 4 pairs of headphones Individual level control for each output Powered via the included 12v AC adapter Built Like A Tank construction