Features:
Ergonomic earplug design for comfortable wearing
Swappable and rechargeable Li-ion battery
Adjustable volume and balance control
Over 120dB output ensures excellent hearing
Longer battery operating time
Automatic gain control
Noise reduction technology
Dual receiver charging ports
Specifications:
Carrier frequency: 2.3MHz
Frequency response: 20 to 20,000Hz
Modulation: infrared and mono/microphone
Signal-to-noise ratio: 60dB
Maximum sound pressure level: 120dB
Battery charging time: 2 hours (fast charging)
Operating time: 12 to 15 hours
Weight: 50g