• With higher power and hi-fidelity output than smartphones, the A1 satisfies your need for more sound quality and quantity
• The A1's volume buttons are made of Alps microswitches for sensitive and reliable operation
• The A1 provides Flat, Bass1, Bass2, and Bass3 EQ modes, switchable simply by briefly pressing the power button,
• Three-Color Status LED
• Frequency response of 20 Hz to 20 kHz