- Wireless push to talk microphone. - Universal for all kinds of cars and vehicles. - 9 Tone Hands-Free operation with override from the horn ring. - A microphone is attached to the remote control,press the button on the left of the remote control and point your mouth to the upper left corner of the microphone. - Low energy consumption, long life and reliable performance, easy to operate.

Siren Box Unit: - 9 Tone Hands-Free Operation with override from the horn ring. - Pre-wired push to talk microphone. - Can control 2 LED lights with Accessory Switches. - Suitable for all kinds of special vehicles to use. Professional Installation Recommended: - If you are installing this on your cigarette plug in your vehicle, you may need to increase the fuse on your cigarette outlet. - Easy to install anywhere with 12V Power. - No installation guide provided, please consult with car audio installer or mechanic. - Custom installation required. Requires 12V Power delivered to 2 wires. - You may have to extend the wire between the speaker and the control module if you are mounting this in your engine bay.