It powers on but does not function. For those who can repair it, or for parts, how about it? Thank you. SONICSPORT Wireless Headphones ATH-SPORT7TW BK Black Brand: Audio-Technica SONICSPORT Wearing style: Separate left and right, completely independent Earphone/Headphone type: Canal type Color: Black系 (Black-based) Wireless/Wired connection: Wireless Earphone/Headphone features: Microphone, Sound quality adjustment, Automatic power-off function, Waterproof, splash-proof, Remote control Low-frequency range (Hz): 20.0 Hz High-frequency range (kHz): 25.0 kHz Sound pressure sensitivity (db): 91.0 db Wireless standard: Bluetooth Wireless function: Multi-pairing Bluetooth version: Bluetooth 5.0 Bluetooth codec: AAC, SBC IP standard (waterproof standard): IPX5 Drive system: Dynamic type Driver size (mm): 5.8 mm Charging terminal: MicroUSB Charging time: 2.0 hours Weight (g): 6.4 g