Features: 100% brand new and high quality Active Noise Cancellation: Isolate the sound and listen to it, using a dedicated noise reduction chip, through receiving and analyzing the additional noise, the opposite signal is generated in the earphone to cancel it. Highly Flexible Material: The earhook can be adjusted automatically according to different ear types, and it is more comfortable to wear without feeling. Wearing for a day is not tired, no weight. Ideal for People Behind the Ear: Bone conduction assisted listening Blue-tooth headsets can solve conversation barriers through BT and enjoy the quality of normal hearing. Shocking Sound Quality Experience: Feel the shocking sound quality experience, can analyze the audio excellently, and present the original sound. Super Battery Life: Let the ears enjoy a little more, long time battery life wireless Blue-tooth headset. Package Includes: 1PC Wireless Hanging Neck Earphone Specifications: Headphone Category: Neck-worn BT Headset Usage: In-ear BT Version: 5.0 Speaker Unit: 12 Mm Moving Coil Speaker Impedance: 16 15% Sensitivity: 105 3db Frequency Response Range: 20hz-20khz Microphone Noise Cancellation: Cvc Noise Cancellation Microphone Sensitivity: -42db Battery Capacity: 150mah+ Charging Interface: Type-c Charging Time: About 1.3 Hours Smart Type: Smart Switch Waterproof Performance: Ipx4 Transmission Radius: 10m Material: ABS Color: Black, Green Net Weight: 97g/0.21lbs note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.