Anself L21 Wireless Earphones BT5.0 Mini Stereo Earbuds Sports Headset with Microphone Noise cancelling Headphone Product details Features: Wireless earphones BT 5.0 mini stereo earbuds sports headset with microphone noise cancelling headphone LED power display. BT 5.0 brings high data transfer speed, stable connection and low power consumption. Wireless dual ear design, left and right ear channel separation. Built-in high-definition microphone, intelligent noise reduction, delivers clearer and more real talking sound in stereo mode. Multi-functional button control let you answer/reject calls, play/pause songs, by pressing these in-ear wireless headphones all without taking your smart phones out of your pocket. 50mAh battery single ear earphone, ensures 4 hours of working time, and charged automatically in the 300mAh charging case; LED power display can know the power status anytime. Specifications: Model: L22 BT Version: BT 5.0 Frequency Range: 20-20000Hz Sensitivity: 42dB Impedance: 32Î Transmission Distance: 10meters (no obstacle) Charging Case Capacity: 3.7V 300mAh Earphone Battery Capacity: 3.7V 50mAh Working Time: about 4 hours Color: Black Charging Case Size: 6 × 3.5 × 2cm/2.4 × 1.4 × 0.8in Charging Case Weight: 36g/1.3oz Package List: 1 x Headphone 1 x Charging Case 1 x Charging Cable 1x User Manual (English / Chinese) Wireless earphones BT 5.0 mini stereo earbuds sports headset with microphone noise cancelling headphone LED power display. BT 5.0 brings high data transfer speed, stable connection and low power consumption. Wireless dual ear design, left and right ear channel separation. Multi-functional button control let you answer/reject calls, play/pause songs, by pressing these in-ear wireless headphones all without taking your smart phones out of your pocket.