Car mounted wireless speaker SP-100K

Transmitter TX-150

Economical IP Network Wall Mounted IPA2

DC constant impedance amplifier LY-102KTB

I5 industrial computer (17.3 inches)

IP Ceiling mounted Coaxial (6 inches)

MP3 Bluetooth Network Power Amplifier (450W)

Active speaker YZ-80APP

Inductive Audio Alarm - Solar Powered GYPD-03

Dipole antenna HCAAY50-500