Specifications:
Model Number: J11
BT Version: BT5.2
Transmitting Distance: 10m/33ft
BT Protocol: HFP, A2DP, HSP, AVCRP
Frequency Range: 20-20000Hz
Sensitivity: 98dB
Impedance: 16O
Charging Box Capacity: 3.7V 450mAh
Earphone Battery Capacity: 2 * 3.7V 50mAh
Music Play Time: about 5 hours (depends on music volume)
Charging Time: about 1.5 hours for earphones, 2 hours for charging box
Color: White
Earphone Item Size: 26.6*21.6*16.4mm/1.04*0.8*0.64in
Earphone Weight: 3.5g/0.14oz (Each Earbuds)
Charging Box Size: 62*40*27.2mm/2.44*1.57*1.07in
Charging Box Weight: 70.4g/1.24oz
 
Package include:
2x Mini Earphones (Left and Right Ear-buds)
1x Charging box
1x Type C charging cable 
1x User Manual