Product Overview:

• Model: 450BT-B
• Audio input: 3.5mm jack type
• Speaker horn: 40mm steel magnet
• Sensitivity: 115±3dB
• Withstand power: 25mW
• Frequency range: 20-20KHz
• Impedance: 24Ω
• Microphone: support
• Frequency range: 30Hz-16KHz
• Sensitivity: -58±3dB
• Bluetooth version: V5.0
• Transmission protocol: EDR+A2DP
• Transmission coding: SBC
• Noise reduction technology: DSP+AEC
• Frequency range: 2.402~2.480GHz
• Effective transmission distance: 10 meters
• Transmit power: 5dBm
• Battery capacity: lithium battery 200mHA
• Charging current: 5V 500mA
• Charging time: <1 hour
• Use time: ≥5 hours
• Standby time: ≥1000 hours
• MicroSD/TF card: support up to 32G, support play/pause/previous/next
• FM listening: Support FM full frequency search and save frequency
• Head bow: PP
• External film: ABS (logo can be customized)
• Arm: ABS  Bowl: ABS Button: ABS
• Gold sheet: aluminum sheet (logo can be customized) 
  
• Earmuffs: leather
• Packing list: headset host, instruction manual, blister, packing box, Micro USB charging cable, 3.5mm audio computer cable.