Artextreme PA01 Headphone Amplifier DIY Assembly 2 in 1 Dual Functions Headphone AMP !#!amp!*! Power Bank Parameters: name: artextreme PA01 type: home use plug: 3.5mm AUX channel: 2.0 chip: CLC2058/ CLC2059/ NE5532 install: built in size: 15x8x1.8cm weight: 0.02kg battery type: 18650*3 (not included) package list: motherboard/ shell/ chromeplate strip Please note that buyers are responsible for all additional customs fees, brokerage fees, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments. The shipping cost does not include any import taxes, and buyers are responsible for customs duties. Note: We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW. Note:Buyer will Bear the freight of return or exchange. If you have any problems with our items or services, please feel free to contact us first before you leave negative feedback. We will do our best to solve any problems and provide you with the best customer services.