The Neckband NB-33 is a wireless headphone with a metal body and Bluetooth 5.1 technology that provides a strong and stable connection. The headphones have a playtime of up to 50 hours and come with a built-in microphone, making them perfect for hands-free calling.

1. Bluetooth Calling: The Neckband NB-33 comes with Bluetooth 5.1 technology that allows for seamless wireless connection with compatible devices. You can take phone calls without the need for wires, making it easier to multitask and move around.

2. Lightweight: The Neckband NB-33 is designed to be lightweight, making it comfortable to wear for extended periods. You can enjoy your music and take calls without feeling weighed down.

3. Vibration Mode: The headphones have a vibration mode that alerts you to incoming calls and messages, so you never miss an important call or text message.

4. Sweat Proof: The Neckband NB-33 is designed to be sweatproof, making it ideal for workouts and sports. You don't have to worry about damage from sweat or water.

5. Built-in Mic: The headphones have a built-in microphone that allows you to take calls and use voice commands without needing to take your phone out of your pocket or bag.

6. Fast Charging: The Neckband NB-33 comes with fast charging technology that allows you to quickly charge your headphones. You can get up to 10 hours of playtime with just 10 minutes of charging.

7. Magnetic Earbuds: The headphones have magnetic earbuds that snap together when not in use, making it easier to store and carry them around.

8. Trendy Design: The Neckband NB-33 has a trendy design that is both stylish and functional. You can wear them with any outfit and look great while doing it.

9. HD Sound: The headphones deliver high-definition sound that is clear and crisp. You can enjoy your music and podcasts with great clarity and detail.

10. Sporty Look: The Neckband NB-33 has a sporty look that is perfect for fitness enthusiasts and active individuals. You can wear them while working out, running, or doing any other physical activity.