Features: Adopt BT5.3 chip, signal transmission is high-speed and stable, providing high-quality sound and quality, a stable connection within 10 meters. Portable wireless stereo wireless BT headphones can be automatically turned on and paired from the charging compartment, and the memory can be connected back to each other. Intelligent touch control, no need to press, comfortable ear-in design, fits the ear outline. Built-in high-definition microphone, intelligent noise reduction, high-quality calls, high-definition call noise reduction technology. Acrylic transparent storage box, 180mah charging compartment, long battery life, longer music playing time, headset fully charged for 1.5 hours, can be used for 4 hours. Specifications: BT Version: BT5.3 Transmitting Distance: 10m/33ft (no obstacle) Frequency Range: 20-20000Hz Sensitivity: 106dB Impedance: 32 Charging Box Capacity: 3.7V 180mAh Earphone Battery Capacity: 2 * 3.7V 15mAh Charging Time: about 1.5 hour WorkTime: 4 hours Material: ABS Color: Black, White(Optional) Package Size: 14*9*3.5cm / 5.51*3.54*1.38in Package Weight: 96g / 3.39oz Package List: 1 * Pair of Earbuds 1 * Charging Box 1 * Charging Cable 1 * User Manual