TH DH Series 4-inch Bluetooth 5.0 ModuleBluetooth 5.0 module. Compatible with Compatible with DH Series 4-Inch Compact Desktop PrintersThe 4-inch DH Series direct thermal desktop barcode… TH DH Series 4-Inch Performance Desktop Printers The 4-inch TH DH Series Desktop Barcode Printers are… TH Series 4-Inch Durable Desktop PrintersThe 4-inch TH Series thermal transfer desktop barcode…