Description: The headphone amp is compact and light-weight design, not bigger than a hand of the adults, easy to use and carry. No matter you are in the college dorms or traveling, you can enjoy your music at any time without disturbing other people. Features: 1. Made of premium metal material, which is durable and practical. 2. Compact and light-weight, easy to use and carry. 3. Up to 15 hours of battery life with supplied lithium battery. 4. AUX jack lets you connect an external audio device such as cellphone or MP3 player. 5. True analog circuit faithfully simulates the response of original amps. Specification: Condition: 100% Brand New Item Type: Guitar Plug Headphone Amp Material: Metal + Plastic Color: Red, Blue (optional) Size: Approx. 8.5*8.0*1.7cm / 3.3*3.1*0.7inch Package list: 1 x Guitar Plug Headphone Amp 1 x USB Cable 1 x Audio Cable Notes: 1. The actual product color may deviate from the photo due to light. 2. There may be a slight deviation in the measurement of product. 1、Made of premium metal material, which is durable and practical. 2、Compact and light-weight, easy to use and carry. 3、Up to 15 hours of battery life with supplied lithium battery. 4、AUX jack lets you connect an external audio device such as cellphone or MP3 player. 5、True analog circuit faithfully simulates the response of original amps.