[MA400 Headphone Amplifier headphone amplifier has the effect of using condenser microphones with ultra-low noise direct insertion. It can provide reliable phantom power for condenser microphones. The GND LIFT button can be used to maintain the ground connection with the mixer to prevent static charges from interfering with your audio signal. [Independent Volume Control]The headphone amp supports independent adjustment of the volume of the microphone signal and the volume of the mixer or Hi-Fi unit signal, and has a mono/stereo switch for switching to achieve maximum flexibility. [Headphone Output]With 1/4inch and 1/8inch output jacks, it can be dapted to most headsets and make it convenient to use. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage: AC100-240V Colour:black Material:plastic Package Contents: 1 x MA400 Headphone Amplifier 1 x Power Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!