Features:∵ Full metal shell， nice touch feelings and wonderful using experience， cool decoration
∵ High capacity battery: 150 hours， 5 minutes charging， 10 hours using time
∵ Portable design， can be put in into pocket
∵ Beautiful appearance， perfect gift

Specifications:
∵ Impedance: 16 - 300ohms
∵ Maximum output power: 100mW
∵ Frequency response: 20 - 20KHz
∵ Digital noise floor: Less than 0.01mV
∵ Signal to noise ratio: 105dB
∵ Charging time: Less than 3 hours
∵ Play time: 150 hours
∵ Gain: 6dB Channels: 2 (2.0)
Model Number: NX1A
Special Feature: Mini，Portable
Usage: Plug and play Package weight: 0.184 kg
Product Size(L x W x H): 9.00 x 6.00 x 1.50 cm / 3.54 x 2.36 x 0.59 inches
Package Size(L x W x H): 17.50 x 11.00 x 3.00 cm / 6.89 x 4.33 x 1.18 inches Package Contents: 1 x Headphone Amplifier， 2 x Silicone Band， 1 x Audio Cable， 1 x USB Charging Cable， 1 x Multilingual User Manual