Brand Name : Gaiby Connectors : USB Control Button : Yes Active Noise-Cancellation : Yes Style : Neckband Communication : Wireless Vocalism Principle : Dynamic Volume Control : Yes Wireless Type : Bluetooth Codecs : NONE Support Memory Card : No With Microphone : Yes Model Number : 900s Wireless Headphone Resistance : 32Ω Frequency Response Range : 20-20000Hz Function : For Mobile Phone Sensitivity : 120±3dB Waterproof : Yes Is wireless : Yes Line Length : None Plug Type : Wireless Support APP : Yes Battery capacity : 400HAM Talk time : 24 hours Music time : 28 hours Standby time : 400 hours Charging time : 2-4 hours Environment : Sport Running Wear Methods : Neckband Bluetooth Version : V5.0 Upgraded version