Power suppy: AC 100 - 240 V
Output power: 4 x 25 Watt
Impedance: 4 Ohm, Frequency response: 150-18000 Hz
Receiver Sensitivity: -88 dBm
Frequency range VHF: 165 - 210 MHz
Oscillating method: ± 0.005% quartz oscillating locked
Wireless effective distance: 35 meters
Receiver channel: Single channel receiver
Speaker External: Include 4 pcs SH-004 speaker (6.5", 4 Ohm, 15W speaker)