Nita

Package Dimensions: ‎4.37 x 4.25 x 2.72 inches; 0.5 pounds.
Working time: 12 hours

Charging time: 2 hours
Charging Box Battery Capacity: Can Charging (Double Machine) Fully 3 Times

Rechargeable Personal Listening Amplifiers Device with Portable Magnetic Contact Charging Box.
Super Fast Charge: Long standby, just charge them 2 hours then you can get 12 hours of working time. 

Multi-bands Operation: Up to 190° turn on the adjustment knob to adjust the volume.

NTC Temperature Monitor: Automatically turn off when the temperature reaches 40°C for safety.

Comfortable Design: Single host machine weighs only 3g. The lightweight design won't make you tired no matter how long you listen.

Applicable Scenarios: shopping, restaurants, square dancing, entertainment.