BT578V3 Version: Model BT578V3. Upgraded Type-C charging port and internal module. Lower power consumption, extended transmission range, and support for high-speed communication. Improved packaging. Previous dedicated charger discontinued—compatible with standard smartphone chargers. Charging indicator light turns off when fully charged. Enables wireless serial communication between RS232 devices and computers, smartphones, or tablets—replacing traditional serial cables. Bluetooth Protocol: Bluetooth V3.0 (SPP) + Bluetooth V4.2 (BLE) Transmission Power: 5 dBm Receiving Sensitivity: -95 dBm Selectable Baud Rates: 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps BLE Serial Communication Characteristic UUID: 0000ffe1-0000-1000-8000-00805f9b34fb Maximum Wireless Range: 30 meters Operating Temperature: -10°C to +55°C Typical Operating Current: 8 mA Applications: - Debugging network equipment such as switches and routers - Connecting total stations, digital levels, theodolites, and other surveying instruments for data reading - Controlling and reading data from ophthalmic instruments - Data transmission for RS232 devices including electronic scales, printers, and PLC-based industrial control systems Charging: Type-C interface; built-in high-capacity lithium battery. Fully charges in approximately 1 hour; runtime up to 24 hours on a full charge. Can also operate while powered via USB. Housing Material: Plastic Color: As shown Package Includes: 1 x Adapter Kit (Color may vary)