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BackSMD battery holder Keystone 2xAAA cell battery holder, http://www.comf.com.tw/ProductDetail.asp?no=148 Keystone type 1057 coin cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder BA9VPC 9V 2xAA cell.
- Latch, https://www.neutrik.com/en/product/nc3fah2-0 A Series, 3 pole XLR.
- Ai Thinker Ra-01 LoRa module.