5 Colorful Kids Headset Support TF Card 3.5mm Plug with Mic

Bluetooth version：V5.0

Frequency range：2.4GHz-2.48GHz

Working Range：Around 10m (open space Max.20m)

Charging Voltage：5V 1A

Operating voltage：3.7V

Standby current：<0.02mA

Music time： ≥7H

Talk Time：≥7H

Standby Time：>148H

Charging time：<2.5H

MIC：40dB±2dB

Output power：>10mW

Output Frequeney：20Hz-20KHz

Batter: Built-in lithium 400mA