New Louder Speaker Wireless TF Card Headphone

High power input for monitoring a high level of sound
Very large sound, like a small speaker
Driver unit: 2*40mm Mylar Speaker
Impedance: 32ohms
Sensitivity(at 1kHz): 115dB
Frequency response: 20-20kHz
Charging time: Around 2-3 hours
Working time: Around 6~8 hours