Features:
Up to 20 hours of the battery service life once being fully charged.
Rail-to-rail amplifier chip from TI company. To the largest extent improves the dynamic range, which allows for the largest dynamic scope and less distortion.
Adopts aluminum-shielded case to prevent external interference noise from the audio device, the wireless signals, and other irrelevant noise.
Fashionable mini appearance.
Light and portable, easy to carry anywhere.
Able to drive various types of earphones.
How to use:
Open the unit, connect audio device to the line in port of unit using the 3.5mm audio cable. Start playback on the connected audio device and connect the headphones to the unit. Now relax yourself and enjoy the HiFi sound quality.
Specification:
Brand Name: Xduoo
Color: Silver / Black ( Optional )
Power Source: DC4.2V built-in li-polymer rechargeable battery
Output power: 100mW(32Ω load)
Frequency response: 10Hz-100KHz(±0.5dB)
Gain: 6dB
THD+N: 0.001 %(1KHz)
S/N: 104dB
Suitable Headphone Impendence: 8Ω-300Ω
Charging time: ＜2H
Playback time:＞20H
Item size: 6.1 * 3.5 * 0.9cm / 2.4 * 1.4 * 0.35in ( L * W * H )
Item weight: 30g / 1.1oz
Package size: 9.1 * 9 * 1.7cm / 3.6 * 3.5 * 0.67in ( L * W * H )
Package weight: 86g / 3.0oz

Package List: V1506B
1* Headphone Amplifier
1* 3.5-3.5 Audio Cable
1* Users' Manual
1* USB Cable