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it can work with wires or wireless via IR.
Operating voltage: 1.8 ~ 3V
Operating Current: 20MA
Work: A / B switch
Frequency: A: 2.3/2.8MHZ B: 3.2/3.8MHZ
Battery during normal working hours: greater than 30h (600mAH standard alkaline battery)
Channel separation: greater than 40dB
Signal to noise ratio: greater than 50dB
Frequency response: 20 ~ 12KHZ
Open to listening distance: greater than 8 meters
Automatically off time when no signal : 2-4 minutes
Switch: separate power supply and A, B switch. The power switch has a dedicated ON / OFF switch.