Feature: 1. Noise Reduction: Bluetooth 5.2 earbuds are hybrid 3 layers active noise cancellation. Outward facing microphone detects external sound and uses the same anti noise counter to reduce ambient noise to 35dB or more. 2. Transparent Mode: Wireless earbuds allows you to hear the sound you want to hear. By letting outside sounds in, you can hear and interact with the world around you. You can clearly hear airline or subway announcements without taking off your headphones. 3. Optical Sensor Technology: Wireless earbuds use optical sensor technology that senses when the headphones are in your ear and pauses when they are removed. Contact sensors, optimized for everyday use and sports situations, enable real time detection of wearing status. 4. One Step Pairing: Wireless headphone will automatically pair two headphones when removed from the charging case. Then simply enable bluetooth connection on your phone to pair the device with the headset. 5. Long Battery Life: Wireless headphone charge one hour can enjoy up to 8 hours of gaming time and charge with the charging case can enjoy up to 22 hours of gaming time. Five minutes of charging will give you an hour of gaming time. Specification: Item Type: Bluetooth 5.2 Earbuds Material: Plastics, Electronics Product Model: J5 BT Version: 5.2 Playback Format: Monaural, Binaural BT Distance: 15m/49.2ft Talking Time: 3 to 4 Hours Playback Time: 4 to 5 Hours Frequency: 2.4GHZ Support Protocol: HSP/HFP/A2DP/AVRCP Noise Reduction Depth: 33 to 38db Charging Time: 60 Minutes Standby Time: 7 to 10 Days Battery Type: Built In 50mAh x 2 (Headphones) and Built In 500mAh (Charging Case) Lithium Ion Battery Noise Cancellation: Bluetooth 5.2 Earbuds are hybrid 3 layers active noise cancellation. 1. Outward facing microphone detects external sound and uses the same anti noise counter to reduce ambient noise to 35dB or more. 2. Inward facing microphone listens inside the ear canal to pick up internal sound and again generates anti noise to eliminate left noise twice. 3. Earbuds prevent 90 percent of noise from entering the ear canal.. Package List: 2 x Earphone1 x Charging Case 4 x Ear Caps1 x Charging Cable1 x Instruction Manual