Product Features: 

Speaker Diameter: Φ40mm 

Frequency response :20-20， 000Hz 

Impedance: 32Ω 

Output sound pressure: 105dB S.P.L at 1KHz 

Rated power: 15mW 

Power Capacity: 150mW 

Cable length: 1.2M 

Plug: Φ3.5mm 

Frequency response :30-16， 000Hz 

Voltage: 3V