Description:    1. HiFi Powerful Bass Stereo Sound Effect:     40mm diaphragm speaker drivers, deep bass stereo sound, enjoy the wireless high quality music    2. Comfortable Over-Ear Fit:     Soft protein leather earpad and retractable headband lifts the burdens for your ear. No discomfort after long-time wearing.    3. Comfortable and Foldable:     Technical ergonomics design with soft earmuffs simulated to human skin texture, ensure long lasting comfort    4. Wireless and Lightweight:     Ear Pad headphones for enjoying extended listening of TV and audio—without disturbing others    5. Built in Microphone:     supports hands-free call and voice reporting incoming call number. With the latest enhanced technology makes you voice sound clearer in noisy environments    6. Ever Power Off, Both Wireless & Wired:     -The wireless mode: A built-in 400mAh battery provides up to 8-10hr music time or talking time in a single charge;     -The Wired mode: you can also use it as a wired headphone with the provided audio cable so the headphones will never power off.    7. Bluetooth 5.0 Adopt:     The Bluetooth 5.0 CSR Chipset, lower power consumption, superior compatibility. Compatible for all the mobile Phone, Tablet PC, Notebook, any devices with bluetooth function Or has A 3.5mm Audio Jack    8. Multi-Functions:     headsets have several options for listening enjoyment. Built in TF card slot and you can use a TF/Micro SD card with loaded MP3 music and listen to the songs directly on your headsets.     9. Colorful LED Light:     Seven-color transform cool breathing light, shine everywhere, anytime.    Specifications:    Bluetooth Version: V5.0    Support Bluetooth Mode: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5    Frequency: 2.402-2.480GHZ, 2.4G ISM band    Frequency Response: 20 Hz - 20 KHz    Signal to Noise Ratio (SNR): 70Db;    Total Harmonic Distortion Rate (THD) 0.1%    Power Indicator: Red and blue lights alternately flashing    Headset Charging: rechargeable 400MAH lithium battery    Charging Port: Mini 5-pin USB charging interface    Normal Charging Time: 2.5 hours    Talk Time: up to 10 hours    Standby Time: up to 20 Days    Operating Temperature: -20℃ - 55℃    Package Included:    1* Headphone    1* Charging Cable