A Bluetooth headset like the M90 Pro typically includes the following features:

1. Wireless Connectivity: The headset uses Bluetooth technology to connect wirelessly to devices such as smartphones, tablets, or computers.

2. Hands-Free Calling: It often comes equipped with a built-in microphone, allowing users to make and receive calls without holding their phone.

3. Controls: The headset usually has buttons for controlling various functions like answering calls, adjusting volume, and skipping tracks when listening to music.

4. Comfortable Design: Many Bluetooth headsets are designed for comfort during extended use, with features like adjustable headbands and cushioned ear cups.

5. Battery Life: Battery life varies, but Bluetooth headsets typically offer several hours of talk or music playback time. Some models may also have a standby mode to conserve battery when not in use.

6. Noise Cancellation: Some Bluetooth headsets come with noise-canceling technology to reduce background noise during calls or while listening to music.

7. Compatibility: They are often compatible with a wide range of devices, including smartphones, tablets, and computers, that support Bluetooth connectivity.

8. Charging: Bluetooth headsets typically come with a charging cable and a rechargeable battery. Charging times and methods can vary.

9. LED Indicators: The headset may have LED indicators to show battery status, connectivity status, or charging status.