Wireless bluetooth headphones made of denim

* Uses Bluetooth version 5.0 + EDR
* SNR is less than 106 dB
* Frequency response ranges from 20 to 20,000 Hz
* Works in the 10m range
* Uses a lithium polymer battery
* The power bank contains 500 mAh
* One earphone can hold 50 mAh
* Individual earphones can hold 3.7V, more than 50mAh
* Charging the case takes up to 2 hours
* Charging the headphones takes 1 hour
* Can work in standby mode for up to 168 hours, including the time that can be
kept in the case
* Can play music for up to 4 hours, but may be affected by volume
* Can facilitate phone calls up to 8 hours
* Can operate in temperatures between -10°C and 55°C
* Equipped with noise canceling function
* Water resistance class IPX5.