I used these earphones for about a week as a temporary replacement while my AirPods were being repaired. However, I no longer need them, so I'm selling them. They are used, but in very good condition. Functionality has been confirmed. Although not an official feature, you can adjust the equalizer using the QCY app. I've included screenshots of it connected. 【Important Notes】 ・Please prepare your own ear tips. The included S size is small and may not fit. Other sizes are not included. ・A USB Type-C cable is not included. 【Official Product Description】 These are truly wireless Bluetooth earphones with a canal type design, featuring Active Noise Cancellation (ANC) to reduce surrounding noise, allowing you to enjoy audio in a quieter environment. 【Specifications】 ・Type: Canal type ・Connection Type: Wireless ・Color: White ・Weight: Approximately 5g per side ・Waterproof Rating: IPX5 ・Supported Codecs: SBC, AAC ・Continuous Music Playback Time: Approximately 5 hours with ANC on, approximately 5.5 hours with ANC off ・Charging Time: Approximately 2 hours for both the case and the earphones ・Continuous Talk Time: Approximately 3 hours with ANC on, approximately 3.5 hours with ANC off 【Items to be Shipped】 ・Earphone case ・Earphone body ・S size ear tips I will clean them with ethanol before shipping.