Portable with lithium rechargeable battery Potaan FX-AUDIO- PH-01J built-in

---------------------------------------------------------------------- FX-AUDIO-The first rechargeable portable headphone amplifier!! Simple single-function portable headphone amplifier (Potaan) Easy charging with lithium rechargeable batteries! Compatible with a wide range of headphones and earphones with gain settings Operational amplifier circuit design with emphasis on sound quality Let's go out with headphones! For those of you who are not satisfied with your smartphone or portable music player. Although it is a portable headphone amplifier that is the same size as a credit card and weighs only 77g, it has a dedicated operational amplifier for each left and right channel, ensuring drive power that can drive heavy-duty headphones while taking into consideration crosstalk. Built-in lithium rechargeable battery allows you to easily charge anytime and anywhere as long as you have the same charging environment as your smartphone! With two operational amplifiers, each left and right channel is independent, and a full-fledged circuit configuration that emphasizes sound quality is firmly driven by positive and negative power supplies, creating an ideal operational amplifier-driven headphone amplifier. The bulk price is limited to the first lot, so we have set it at an affordable price! *Although it is called bulk, it does not come with a USB charging cable (a general-purpose Micro USB cable for smartphone charging, etc.), but it comes in a sturdy presentation box. [Notes] *Operation is not guaranteed for input/output terminals with 4-pole plugs (TRRS). *Using at high volume for a long time may cause hearing damage. Please enjoy at an appropriate volume. *Please do not disassemble, modify, or repair the product yourself. Failure to do so may cause malfunction or fire. *Do not use or store in high-temperature places such as saunas or inside cars, or near heat appliances. It may shorten battery life, cause malfunction or fire. *If you notice any abnormalities such as smoke or burning smell, please immediately turn off the power to the main unit and stop using it. Continuing to use the product in this state may cause malfunction, injury, or fire. *If the battery is left at 0% charging rate for a long period of time, the performance of the battery may deteriorate significantly or charging may become impossible. [Notes regarding charging] -Estimated charging time: 2 to 3 hours until fully charged *Varies depending on the power supply capacity of the connected USB port. When charging with a standard USB 1.1 port, it takes approximately 2 to 3 hours to fully charge from the operating stop voltage. ・Estimated usage time: 6 to 8 hours (continuous operation time) *32Ω headphones ・When GAIN setting [High] ・For long-term storage: Store in a cool, dark place with a charging rate (SOC) of 30 to 50%. *Do not leave it at 0% for a long time. ・Using the product while charging may shorten the battery life. [Product specifications] Brand: FX-AUDIO- Product