Solar TWS sports waterproof with 300mAh powerbank ,CHOETECH BH-T09

Bluetooth version: V5.0 AIROHA
Bluetooth operating frequency: 2.402GHz-2.480GHz
Receiving distance: ≤15 m
Audio S/N:≥95dB
Battery: Lithium battery 3.7V/ 40mAh
Microphone: digital silicon microphone 38dB
Charging time: earbuds 1.5H，charging case about 2H
Talking/playing time: about 4-5 hours (the actual use time depends on the type of song
and volume requirements)
Supporting protocol: A2DP、AVRCP、SPPP、HFP、HSP