ivdo not place the product on a vibrating surface.• Never use it under sporting, exercising, or any vibrating environmentwhich will probably cause unexpected short current or damage rotordevices, HDD, Optical drive, and even exposure risk from lithium batterypack.Safe listeningFollow these instructions, suggested by hearing experts,to protect your hearing.• Gradually increase the volume until you can hear it clearly and comfortablyand without distortion.• After setting the volume level, do not increase it afteryour ears adjust.• Limit the amount of time listening to music at high volume.• Avoid turning up the volume to block out noisy surroundings.• Turn the volume down if you can’t hear people speaking near you.Using electrical power• This product should be operated from the type of power indicated on themarking label. If you are not sure of the type of power available, consultyour dealer or local power company.• Do not allow anything to rest on the power cord. Do not locate thisproduct where people will walk on the cord.• If an extension cord is used with this product, make sure that the totalampere rating of the equipment plugged into the extension cord does notexceed the extension cord ampere rating. Also, make sure that the totalrating of all products plugged into the wall outlet does not exceed the fuserating.• Do not overload a power outlet, strip or receptacle by plugging in toomany devices. The overall system load must not exceed 80% of the branchcircuit rating. If power strips are used, the load should not exceed 80% ofthe power strip's input rating.• This product's power supply is equipped with a three-wire grounded plug.The plug only fits in a grounded power outlet. Make sure the power outletis properly grounded before inserting the power supply plug. Do not insertthe plug into a non-grounded power outlet. Contact your electrician fordetails.Warning! The grounding pin is a safety feature. Using a poweroutlet that is not properly grounded may result in electric shockand/or injury.Note: The grounding pin also provides good protection fromunexpected noise produced by other nearby electrical devices thatmay interfere with the performance of this product.