The earphones are comfortable in the ears, and will not be painful when worn for a long time, and they will not fall off easilyThe wide compatibility allows the headset to be easily matched and connected with the device you are using, simple to use and easy to operateWhether as a gift to a friend or to yourself, this will be a great value choice Item Name: Wireless Earphones Material: ABS Bluetooth Version: V5.0 + EDR Wireless Frequency: 2.4GHz Support Protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission Distance: 15 Meters Battery Capacity: 45mAh for Single Earphone, 350mAh for Charging Box (Included) Charging Voltage/Current: 5V/1A Play/Talk Time: about 3 Hours Charging Time: about 1 Hour Standby Time: 60 Hours Speaker Diameter: 10mm Speaker Impedance: 32Ω Microphone Sensitivity: -42dB Working Temperature: -10 Degree Celsius - 50 Degree Celsius Features: Wireless, Bluetooth 5.0, Stereo, Comfortable to Wear Charging Box Size: 6.2cm x 4cm x 2cm/2.44" x 1.57" x 0.79" (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 Pair of Wireless Earphones 1 x Charging Box 1 x Charging Cable 1 x User Manual