810's Specifications:
Loudhailer diameter: Φ40mm
Frequency range:20 to 20.000Hz
Sensitivity:111±3dB
Impedance:16Ohm
Input power:30mW(maximum)
Mic diameter:Φ6.0x5.0mm
Mic Impendance:≤2.2KΩ at 1khz
Mic Sensitivity: -54±3db
Directivity: 0mnidirectional
Cable length:2.2m(approximately)
Plug:3.5mm