If you purchased before August, 2018, please read “Avantree TWS109 user guide for 2017 batch” (Batch No. 17H1)
If your purchased in / after August, 2018, please read “Avantree TWS109 user guide for 2018 batch” (Batch No. 18B1)
If you purchased before August, 2018, please read “Avantree TWS109 user guide for 2017 batch” (Batch No. 17H1)
If your purchased in / after August, 2018, please read “Avantree TWS109 user guide for 2018 batch” (Batch No. 18B1)
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