Version 1: Finished headphone amplifier + usb charging cable + 3.5mm signal cable
Version 2: Headphone amp pcb board (no shell, no battery, you need to equip your own battery to use
Length, width and height are 57mm*50mm*22mm, equipped with 1200ma large-capacity battery, and the battery life can reach 12 hours.
Finished machine size with shell: 57mm*50mm*22mm (length, width and height, excluding the protruding part of the volume knob)
Power supply: external USB charging, built-in 1200ma polymer battery
Indicator color description: power-on indicator-blue
Charging indicator-red
Full indicator light-green
Volume adjustment knob with power switch:
1: Rotate clockwise-turn on, and then increase the volume.
2: Rotate counterclockwise-the volume decreases, and then power off.
Use attention;
The charging interface can only use 5v power supply, such as computer usb interface, mobile phone charger, etc. 5v power supply. Using a power supply higher than 5v will damage the internal circuit. Try not to turn it on when charging, because the power supply will cause interference during charging, which will seriously affect the use effect and damage the circuit in severe cases.

4 GREAT REASONS TO BUY FROM US:
- Over 37,000 happy customers worldwide
- Real people on our support team ready to help
- The finest materials and stunning design — all our products are developed with an obsessive dedication to quality, durability, and functionality
- We use the most secure online ordering systems on the market, and are constantly improving our software to make sure we offer the highest possible security

BUY WITH CONFIDENCE
Our mission is to make your shopping experience as safe and enjoyable as possible. Have questions? Feel free to contact our award-winning customer care team for advice on everything from product specifications to order tracking.
- Money back guarantee: Something not quite right? If you’re not totally satisfied with your purchase, you can return it within 15 days for a full refund
- Risk-Free Purchase: We utilize industry-standard Secure Sockets Layer (SSL) technology to allow for the encryption of all the sensitive information, so you can be sure your details are completely safe with us
- Trustworthy payment method: We partner with the most popular online payment solutions that guarantee enhanced security and fast transaction processing