V5.0 Over-Ear Bluetooth Headphones,foldable Wireless headsets BT heaphones CSR Built-in Mic ANC Mode

• Input terminals: DCФ3.5DC Plug 4 
• Working voltage: 3.7V 
• Maximum output power: 90MW 
• Noise level :20db 
• Signal to noise ratio (SNR): ≥ 90db 
• Power supply: 600mA  lithium battery 
• Rated operating time:≥28h 
• Noise Reduction Type: One-way feedback
• Speaker diameter: Ф40mm 
• Speaker Impedance: 32Ω 
• Speaker frequency response: 20Hz - 20KHz 
• Speaker sensitivity: 115dB 
• Wire length: pvc wire, 1.2m