Thank you for viewing! Brand new, unused Free shipping We have many other wonderful products, so please take a look (##) #EmaSHOP Products certified with the Technical Regulations Compliance Mark (Frequency band: 2.4GHz band) Approximately 2 hours of full charge for up to 20 hours of continuous playback Approximately 10 minutes of charging for approximately 2 hours of continuous playback Low latency mode to reduce audio-visual lag Overwhelming low-frequency expression wirelessly Supports multi-point connection, allowing simultaneous connection of two Bluetooth devices