My headphones won't turn on after charging for an hour. There are no sounds or lights.
Based on the manual for the KOSS BT740IQZ Bluetooth Wireless Headset, here are some points regarding charging and power indicators: The manual states that…
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KOSS BT740IQZ Bluetooth Wireless Headset User Manual — questions & answers
Read product questions and troubleshooting answers linked to KOSS BT740IQZ Bluetooth Wireless Headset User Manual.