I tried to use it after a long time, and after charging it, the light just blinked and it wouldn't work. I can't tell if the case is bad, the earphones are bad, or both are bad, so I'm selling it as junk. Wireless Noise Canceling Stereo Headset WF-1000XM5 Brand: SONY Wearing style: Separate left and right, completely independent Earphone/Headphone type: Canal type Structure: Sealed Color: Black Wireless/Wired connection: Wireless Earphone/Headphone functions: Noise canceling, Hi-Res, Microphone, External sound capture, Sound quality adjustment, Waterproof, Splashproof, Remote control Low-frequency range (Hz): 20.0 Hz High-frequency range (kHz): 40.0 kHz Wireless standard: Bluetooth Bluetooth codec: LDAC, AAC, SBC IP standard (waterproof standard): IPX4 Drive method: Dynamic type Driver size (mm): 8.4 mm Charging terminal: USB Weight (g): 11.8 g