Up to 70 Hours Playtime Enjoy non-stop entertainment with long-lasting 70H battery backup on a single charge, making this Bluetooth neckband headphone perfect for travel, workouts, and binge-watching. Bluetooth v5.4 Seamless Connectivity Equipped with the latest Bluetooth version 5.4 for ultra-stable wireless connection, faster pairing, and lower latency on your Harmonics Y2 neckband headphones.