It is powered by a built-in lithium battery and has a battery life of about 48 hours.It is charged by the microusb port.When charging,it lights up red and is full of green light. Front-mounted fever-level op amp buffer + professional-grade amp chip for 16-160ohm headphones,high power,large thrust

--built-in lithium battery, charging can be used for about 48 hours,charging time is about 2 hours, lithium battery comes with protection circuit
--The voltage is too low will automatically shut down
--Using solid state electrolysis for power supply filtering,fast charging and discharging speed,large current,good sound dynamics
--Patch SMT process, small interference, beautiful sound
--Input and output ports are gold-plated 3.5mm interface,high reliability contact performance
--All-aluminum shell,small size,light and easy to carry, suitable for going out,walking, listening to music

Size: 85mm*58mm*10mm
Weight: 50 grams
Signal to noise ratio: 115db
Distortion: 0.009%/32 ohms, 130 MW
Output power: 0.13W/32 ohms
Output impedance: 10 ohms
Gain: 5 times
Supports headphones with an impedance of 16-160 ohms