Please kindly noted that this item is sold by Yinlibo from Joybuy marketplace. Description: With Bluetooth 5.1 chip, the Bluetooth earphone has high speed and stable transmission, bringing strong ability of anti-interference. It is convenient to use the earphone, which supports smart-touch. With DSP noise reduction technology, the wireless earphone has stereo and heavy bass sound effect. It is comfortable to wear the earphone with ergonomic design. Made of premium ABS and electronic component material, the wireless earphone is reliable and durable. Length of the charging box is 7cm, width is 4.5cm and height is 3.5cm. It is suitable for you to use it for home, office, travel, sport, etc. Item Name: Wireless Earphone Material: ABS,Electronic Component Charging Time: about 1 Hour Sensitivity: -42dB Operating Temperature: -10-50 Degree Celsius Charging Voltage: 5V Playback Time: 4 Hours Frequency Response: 2.4GHz Charging Current: 1A Charging Interface: Type-c Impedance: 32Ω Bluetooth Protocol Support: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission Distance: 10m Bluetooth Version: 5.1+EDR Talk Time: 4 Hours Standby Time: 60 Hours Charging Compartment Battery Capacity: 500mAh (Included) Speaker Diameter: 8mm Earphone Battery Capacity: 45mAh (Included) Size Details: Charging Box Size: 7cm x 4.5cm x 3.5cm/2.76" x 1.77" x 1.38" (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 Wireless Earphone 1 x USB Charging Cable 1 x User Manual