Brand Name: Lenovo Style: Bone conduction headphones Vocalism Principle: Bone Conduction Origin: Mainland China Audio latency: - Material: PVC Speaker maximum output power: - High-concerned chemical: none whether electrical: Yes Communication: WireLess Volume Control: Yes Charging Time: 1 Control Method: Push button Category: Earphones & Headphones Department: Unisex-adult Plug Type: NONE Impedance Range: up to 32 Ω Active Noise-Cancellation: Yes Waterproof: Yes Voice assistant built-in: no Wireless Type: Bluetooth Control Button: No Charging Method: cable Support Memory Card: Yes Function: Sport Function: For Swimming Function: For Study Function: for Powersports With Microphone: Yes Features: Waterproof Features: With microphone Features: Active Noice Cancelling Feature 1: Active Noice Cancelling Feature 2: Volume Control Function3: HD Screen Long Battery Life Wireless Bluetooth Headphones Feature 4: HiFi Sound Neckband Earphones Feature 5: Sports Headsets Feature 6: Noise Reduction Earphones Feature 7: Waterproof Earbud with LED Display Feature 8: Wireless Bluetooth Earphones Choice: yes semi_Choice: yes