Sennheiser HD 450BT Instruction manual HD 450BT - Page 2

Important safety instructions Important safety instructions ▷ Read this instruction manual carefully and completely before using the product. ▷ Always include this instruction manual when passing the product on to third parties. ▷ Do not use the product if it is obviously defective or makes loud, unusual (whistling or beeping) noise. ▷ Only use the product in environments where Bluetooth® wireless transmission is permitted. Preventing damage to health and accidents ▷ Protect your hearing from high volume levels. Permanent hearing damage may occur when headphones are used at high volume levels for long periods of time. Sennheiser headphones sound exceptionally good at low and medium volume levels. ▷ The product generates stronger permanent magnetic fields that could cause interference with cardiac pacemakers, implanted defibrillators (ICDs) and other implants. Always maintain a distance of at least 3.94"/10 cm between the product component containing the magnet and the cardiac pacemaker, implanted defibrillator, or other implant. ▷ Keep the product, accessories and packaging parts out of reach of children and pets to prevent accidents. Swallowing and choking hazard. ▷ Do not use the product in an environment that requires your special attention (e.g. in traffic or when performing skilled jobs). Preventing damage to the product and malfunctions ▷ Always keep the product dry and do not expose it to extreme tem- peratures (hairdryer, heater, extended exposure to sunlight, etc.) to avoid corrosion or deformation. The normal operating temperature is from 0 to 40 °C/32 to 104 °F. ▷ To avoid loud, unusual (whistling or beeping) noise and to ensure proper noise cancellation, do not cover the microphone openings of the active noise cancellation circuitry located on the outside of the ear cups. ▷ Use only attachments/accessories/spare parts supplied or recommended by Sennheiser. ▷ Clean the product only with a soft, dry cloth. ▷ Use the product with care and store it in a clean, dust-free environment. Safety instructions for the lithium polymer rechargeable battery WARNING If abused or misused, the rechargeable batteries may leak. In extreme cases, they may even present a risk of: • heat generation, • fire development, • explosion, • smoke or gas development. 2 | HD 450BT