Earphone

The utility model discloses an earphone. The earphone comprises a button circuit. The earphone further comprises an earphone battery, an ADC analog-to-digital conversion module and a control chip all arranged inside the earphone. The button circuit comprises a plurality of serially-connected resistors, and parallel-connection switching buttons and a plurality of function buttons. The switching buttons and the function buttons all have one end together grounded and the other end respectively electrically connected with each node of the serially-connected resistors. The earphone battery is electrically connected to the input end of a voltage stabilizing module. After the output end of the voltage stabilizing module is serially connected with a divider resistor, the output end is further electrically connected with the input end of a level comparison converter. After the input end of the ADC analog-to-digital conversion module is electrically connected with the input end of the level comparison converter, the in