[. . . ] Hi-level Sensing Power On feature allows unit to be activated without need for REMOTE connection. Built in variable LPF (Low pass filter), variable subsonic filter, and low boost circuit. When the PROTECTOR is activated the indicator will change from green to red. [. . . ] Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit. This amplifier is provided with a protection circuit that operates in the following cases: - when the unit is overheated - when a DC current is generated - when the speaker terminals are short-circuited The color of the POWER/PROTECTOR indicator will change from green to red, and the unit will shut down. If this happens, turn off the connected equipment, take out the cassette tape or disc, and determine the cause of the malfunction. If the amplifier has overheated, wait until the unit cools down before use. Notice for customers: the following information is only applicable to equipment sold in countries applying EU directives If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer. Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This symbol on the product or on its packaging indicates that this product shall not be treated as household waste. Instead it shall be handed over to the applicable collection point for the recycling of electrical and electronic equipment. By ensuring this product is disposed of correctly, you will help prevent potential negative consequences for the environment and human health, which could otherwise be caused by inappropriate waste handling of this product. For more detailed information about recycling of this product, please contact your local Civic Office, your household waste disposal service or the shop where you purchased the product. For any service or guarantee matters please refer to the addresses given in separate service or guarantee documents. Choose the mounting location carefully so the unit will not Interfere with the normal movements of the driver and it will not be exposed to direct sunlight or hot air from the heater. Do not install the unit under the floor carpet, where the heat dissipation from the unit will be considerably impaired. First, place the unit where you plan to install it, and mark the positions of the four screw holes on the surface of the mounting board (not supplied). Then drill the holes approximately 3 mm (1/8 in) in diameter and mount the unit onto the board with the supplied mounting screws. [. . . ] In High level input connection, car audio unit can also be activated without need for REMOTE connection. Notesonthepowersupply Connect the +12 V power supply wire only after all the other wires have been connected. Be sure to connect the remote control wire of the car audio unit to the remote terminal. [. . . ]