Using an ergonomic tilt design, this headset fits snugly in the ear canal and provides a firm and comfortable hold that is not easily dislodged. Bluetooth-compatible 5.2 version is used for this wireless headset, allowing 10-15 meters long distance transmission and featuring such as lossless sound quality, HiFi sound, low latency, and call noise reduction. It is constructed of ABS material. The length of this product is 4.43cm, the width is 4cm and the height is 2.2cm. It is suitable for daily life, office, sports, travel, etc. Item Name: Earphone Material: ABS Features: Noise Reduction, Portable, Long Endurance Bluetooth-compatible Protocol: 5.2 Channel: Stereo How To Use: Hanging Ear Product Speaker: 8cm Copper Ring Speaker Standby Time: 180 Hours Working Time: 5 Hours Charging Time: About 1 Hour Effective Distance: 10-15 Meters Without Obstacles Headphone Battery Capacity: 50mAh(Included) Size Details: LxWxH: 4.43cm x 4cm x 2.2cm/1.74" x 1.57" x 0.87"(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 Earphone(for Right Ear) 1 x Ear Cap 1 x Charging Cable 1 x User Manual