3IMPORTANT SAFETY PRECAUTIONS Please read all of these instruction carefully. Please keep this users manual for later use. Please disconnect this equipment from AC socket-outlet before cleaning. Don‘t use liquid or aprayeddetergent for cleaning. Use moisture sheet or cloth for cleaning. For pluggable equipment, the socket-outlet shall be installed near the equipment and shall be easilyaccessible. Please keep this equipment from humidity. Lay this equipment on a reliable surface when install. A drop or fall could cause injury. The openings on the enclosure are for air convection hence protect the equipment from overheating.Do Not COVER THE OPENING. Make sure the voltage of the power source when connect the equipment to the power outlet. Place the power cord such a way that people can not step on it. Do not place anything over the powercord. All cautions an d warnings on the equipment should be noted. If the equipment is not used for long time, disconnect the equipment from socket-outlet to avoid beingdamaged by transient overvoltage. Never pour any liquid into openings, this could cause fire or electric shock. Never open the equipment. For safety reason, the equipment should only be opened by qualified servicepersonnel. If one of the following situations arises, get the equipment checked by a service personnel:a. The power cord or power plug is damaged.b. Liquid has penetrated into the equipment.c. The equipment has been exposed to moisture.d. The equipment does not work well or you can not get it work according to users manual.e. The equipment has dropped and damaged.f. The equipment has obvious sign of breakage. The sound pressure level at the operator position according to DIN 45 635 part 1000 is equal or less than70 dB(A). The equipment can be operated at an ambient temperatures of 35˚C maximum. CAUTION: Danger of explosion if battery is incorrectly replaced.Replace only with the same or equipment type. Recommended by the manufacturer. Dispose of usedbatteries according to the manufacturer's instructions.