LANGSDOM TN33 Bluetooth Wireless Earphone Noise Reduction HiFi Sound In-ear Headset Headphone with Charging Case - Black

• Ultra-low latency keeps synchronized with audio and video, convenient to keep in contact with your teammates all the time
• Bluetooth connectivity, adopting intelligent noise reduction design, provides 360-degree stereo bass HiFi sounds quality
• Mini size & lightweight, easy to carry, automatically connecting 
• The LED display screen for showing the remaining power status
• With the 250mAh charging case, you can charge the headphones on the go
• Built-in microphone for hands-free calling and answering by touching
• Great for running, hiking, cycling, car driving, business occasion, etc, enjoy the superb sound quality 

Specification:

• Chip scheme: JL AD6973D
• Bluetooth protocols: HSP, HFP, A2DP, AVRCP
• Bluetooth version: V5.1
• Frequency: 2.402-2.480Ghz
• Working distance: ≥10 meters
• Bluetooth antenna mode: ceramic antenna
• Frequency range: 20HZ-20KHZ
• Sensitivity: 103dB±3dB @1KHz
• Earphone battery: 440911-35mAh/3.7V
• Charging case battery: 701230/250mAh/3.7V, with protection board"
• Charging case charging voltage/current: 5V 0.5A
• Earphone charging time: about 1.3H
• Charging time of charging case: about 1.5H
• Standby time: about 180 days
• Earphone charging voltage: 5V 0.02A
• Overall weight: 49.8g
• Impedance: 32Ω ±10%
• Rated power: 3mW