The Ring RCV9940 is an amber warning beacon with stem fixing, for secure installation on the vehicle and flexible movement. The fixing allows the lamp to be positioned as needed. The tough polycarbonate lens and polypropylene housing makes it resilient to extensive use. Requires H1 bulb. Reg 65 approved, and rated IP55 - dust and waterproof. Rotates to produce warning light. Suitable for 12V and 24V vehicles.