High-Quality Sound: Experience superior audio quality with the LSY-20 in-ear monitor system, designed for audiophiles and professionals alike. Versatile Connectivity: Featuring a stereo/mono switching function and wireless IEM gain button, this amplifier caters to various listening preferences and environments. Wide Compatibility: Suitable for headphones with a maximum impedance of less than 32 Ohm, ensuring broad compatibility with most audio devices. User-Friendly Design: The built-in battery-free design ensures easy portability and convenience, making it ideal for on-the-go musicians and sound engineers. Safe for Health: Made without high-concerned chemicals, this amplifier provides a safe listening experience for all users. NOTE: Do not wear headphones at high volume for a long time, as this may cause permanent hearing damage. Do not expose this product to rain or use it in a humid environment which may cause improper use or unauthorized disassembly and modification of the product. Color: Silver Material: Aluminum Alloy Package Contents: 1*Amplifier(without 2*AAA batteries) 1*Audio cable 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.