Network Multimedia Teaching Speaker T-7707B

Fixed voltage and fixed resistance amplifier DY-6110

32 channel RP206 network fire alarm terminal

Network paging microphone (4.3-inch) RP20

AC/DC constant impedance amplifier LY-202BT

Wireless receiving sound column 3D-80

16 channel RP106 network fire alarm terminal

Wireless receiving sound column 1DTS6240

IP Ceiling mounted Coaxial (6 inches)

Lawn speaker TS6240