Car mounted wireless speaker SP-40K

Network Multimedia Teaching Speaker T-7707B

Active speaker YZ-50APP

DC constant impedance amplifier LY-201KBT

Transmitter TX-950

Wireless receiving sound column 1D-120

4G receiving device 3D-01

IP Ceiling mounted Coaxial (5 inches)

IP External Waterproof Sound Column - Engineering Type IP703

Receiver TYNRX-6100