BLE V5.0 RS-232 adapter user manual V1.0 2018.05.221Bluetooth V5.0 BLE RS-232 Serial AdapterModel: S2B5232E1. Package content:BLE V5.0 RS-232 adapterWhite Box: 11 x 6 x 5 (cm)Total Package Weight: 105 gPackage Contents: BLE V5.0 RS-232 adapter x 1 A4 User manual x 1 Mini USB Cable x 12. Profile:2.1 Top view:LED Status DescriptionData LED flash Data transmissionData LED solid on No data transmissionLink LED solid on BLE LinkLink LED flash No LinkData & Link LED solid on DFU/OTA ModeDB9 (Female)Mini USB (Power)▲▲▲▲ + (5~40 VDC)▼ GNDReset to DefaultLED:Link: BluePWR/Data: Red2 dBi Antenna