Two-Way Window Intercom System for Counter Rl-9909

System for Counter Feature: Dual-way intercommunication Slim fit design of speaker Anti-interruption and noise Dual-way audio record Performance Data: Brand: RL Working voltage: DC9V/0.5A Input voltage: AC 110-240V Cale length: 160cm Main sound (sub sound): 2W, 100Hz-15KHz Inside microphone: -48db 20Hz-20KHz Outside microphone: -48db 20Hz-16KHz Main box size: 158x87x46(335)mm Deputy box: 91(D)x23(H)mm