Experience the ultimate in wireless convenience and crystal-clear audio with siindoo Wireless Bluetooth Headphones. These headphones feature a dynamic vocalism principle and high-quality materials, including metal, PVC, plastic, leather, and memory foam, to provide unmatched comfort and performance. With certifications from CE, FCC, and weee, as well as 2 drivers, up to 32 Ω impedance range, and 5.1 bluetooth version, these headphones deliver a frequency response range of 20 - 20000 and a wireless range of <10m. Plus, with a weight of 265g and a battery capacity of 400mAh, you can enjoy hours of listening without ever having to worry about being tethered to a cable. Take your listening experience to the next level with siindoo Wireless Bluetooth Headphones.