Description AWEI A710BL Wireless Bluetooth Over-Ear Foldable Headphone with Active Noise Cancellation (ANC) Key Features: Active Noise Cancelling Technology: It blocks out airplane cabin noise, city traffic or a busy office noisy environment, results in a more enjoyable music, movie, working or gaming experience. Impressive Sound Quality: Provides immersive HiFi sound, accurate bass response thanks to 40mm Driver. Sound Quality matches the high-end Over-Ear Headphones in the Market. Upgraded Soft Memory Leather Protein Ear Cushions for maximum Comfort: The memory ear cushions simulate human skin texture, ensuring long lasting comfort. The slider and softly padded headband give it a perfect fit for long hours of usage. Hassle-free Clear Calls and Built-in Mic: Provides a quick and stable connection with your Bluetooth enabled devices like mobile phones, tablets, PC, TVs within 10m. High-quality built-in microphone* for a quiet hands-free call experience even in a loud environment. * The microphone only works in the wireless mode. Foldable and Rotatable Design: The foldable and rotatable design is not only designed for saving your desk space but for conveniently carrying the headphone wherever you go. Technical Specifications: Material: ABS (Skin Friendly) Color: Black BT version: 5.0 Profile support: HSP/HFP/A2DP/AVRCP Standby time: 200h Talk time: 14h Music play time: 13h Charging time: 2h Charging voltage: DC 5V Frequency range: 2.402GHz - 2.480GHz Ambient temperature: -20/+60°C Transmission distance: 10m Battery capacity: 300mAh/3.7V Driver unit: 40mm Sensitivity: 97dB±3Db Impedance: 32Ω±15% Frequency response: 20-20000Hz Package size: 23 x 22 x 6 cm Net weight: 255g Note: The microphone only works in the wireless mode.