Vocalism Principle: Dynamic Control Button: Yes Active Noise-Cancellation: Yes Communication: Wireless+Wired Volume Control: Yes Sensitivity: 120dB Wireless Type: bluetooth Is wireless: Yes Max Output: 10mW Line Length: 1.35m Support APP: No Number Of Drivers: 4 Plug Type: Line Type Impedance Range: up to 32 Ω Connectors: USB Model Number: E9 PRO Headphones Earcups Type: Sealed Headphone Pads Material: Memory Foam Bluetooth Version: 5.0 Codecs: Apt-X Codecs: sbc Support Memory Card: No Driver Diameter: 40mm Resistance: 32Ω Waterproof: No Frequency Response Range: 20 - 20000Hz Total Harmonic Distortion: 1.15% With Microphone: Yes Charging Method: CABLE Magnet Type: Ferrite Profile: HSP/HFP/A2DP/AVRCP Charging port: Micro USB Battery tpye: Built in 500mah lithium battery Fast charging: YES Play time: About 30-35 HOURS Charging time: About 1 hours
