This smart bluetooth-compatible headset can receive audio from bluetooth-compatible phones, bluetooth-compatible laptops and other bluetooth-compatible devices. Supports incoming voice report; supports Chinese voice prompts (such as power on, power off, pairing, redialing); supports end redial function; Supports for connecting two mobile phones. Supports two-channel stereo (plug the sub-headphone to the mic USB interface), you can enjoy the high-definition and perfect stereo sound quality. Ergonomically designed, equipped with an adjustable earhook for 99% of the ear, comfortable to wear. Suitable for all bluetooth-compatible devices such as smartphones, computers, tablets, laptops, car navigation, etc. Item Name: bluetooth-compatible Earphone Material: ABS Charging Time: About 2 Hours Battery: 260mAh Lithium Polymer Battery (Included) Bluetooth Version: CSR8615 5.0 Communication Distance: Barrier-free 10m Continue Talk Time: About 25 Hours Standby Time: About 45 Days Features: bluetooth-compatible 5.0, Wireless, Stereo, Comfortable to Wear, Portable, Long Battery Life, Noise Reduction Length: 5.6cm/2.2"; (Approx.) Width: 2.2cm/0.87"; (Approx.) Height: 1cm/0.39"; (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x bluetooth-compatible Earphone 1 x Charging Cable 2 x Ear Hook 2 x Eartip 1 x Sub Earphone