The TM-17 has a hand-held microphone with helix cable.

Features:-

• It has a Lockable talk button and volume control at the microphone.
• The output is up to 110db.
• There is an operating switch for the siren, speech and whistling sound.
• It has a Jack for external 12V battery operation and a connection cable for Motor Vehicles.
• It requires 8 x C Size Batteries (Not included).