Description: 【Portable Design】: Headphone amplifier converter is small in size and light in weight, making it easy for users to carry it with them to meet travel needs and enjoy high quality audio experience anytime and anywhere. 【XLR to 3.5MM Audio】: This Portable Headphone amplifier can convert the XLR XLR interface into a 3.5MM audio interface, making it convenient for users to connect to various audio devices and has strong compatibility. 【Passive Direct Amplification Design】: A portable Headphone amplifier does not require a power supply. It can be used directly by just connecting the audio equipment. It is simple, convenient, and fast to operate. 【High Quality Sound】: Headphone Adapters use high quality materials and advanced technology, which can effectively reduce loss, ensure high quality audio transmission, and bring a pure sound quality experience. 【Durable and Strong】: The headphone amplifier converter casing is made of sturdy and durable materials, which can effectively prevent accidents such as drops and collisions and has a long service life. Size Chart: 9.1cmx3cmx2.5cm/3.58inchx1.18inchx0.98inch Package Includes: 1 Headphone amplifier converter 1 XLR connector Note: Please allow slightly errors due to manual measurement and different monitors.