V5.3/JL6983D4 Semi-ear earphones

1.BT/CHIP: V5.3/JL6983D4 
2. Distance: 10M     
3. Battery capacity: Charging case  300Ah with protection board, earbuds 30mAh*2
4. Playing time: 4-5H,  c Charging times: 2 times, charging case: 1.5H，charging time for earbuds: 1H，standby: 100H 
5. Driver:φ10mm impedance: 32 Ω, 5V, frequency: 20hz-20Khz, SPK sensitivity: 96±3db     
6. Product size: 58mm*47mm*25mm, weight: 36g
7. The earphone without Li-ion IC protection board