Warning – Rechargeable battery
• Only use suitable charging devices or USB connections for
charging.
• As a rule, do not charge devices or USB connections that are
defective and do not try to repair them yourself.
• Do not overcharge the product or allow the battery to
completely discharge.
• Avoid storing, charging or using batteries in extreme
temperatures.
• We suggest to fully charge the item for at least one time in
two months
Warning – Loud volume
4
• Using this product limits your perception
of ambient noise. For this reason, do not
operate any vehicles or machines while
using this product.
• Always keep the volume at a reasonable
level. Loud volumes, even over short
periods, can cause hearing loss.