JL Jerry AC690X Series Overview (use google translate) : r/AC690X
Jl Bluetooth Development Board Chip Ac692n Series 6925a/6926a/6925b Dual Mode 5.0 Audio Ble - Circuits - AliExpress
Zhuhai Jieli AC690X/AC692X Bluetooth Classic BrakTooth denial of service - Cloud WAF
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GitHub - christian-kramer/JieLi-AC690X-Familiarization: Adventures in figuring out how this incredibly ubiquitous, yet incredibly mysterious integrated circuit works.
Jl Bluetooth-compatible Development Board Supports Jl692x Full System Solution - Speaker Accessories - AliExpress