Features APPLICABLE FAPPLICABLE FOR RS232, RS485: 9 pin 9 hole screw terminal block is suitable for RS232, RS485, works for excellent connection OR RS232, RS485: 9 pin 9 hole screw terminal block is suitable for RS232, RS485, works for excellent connection DB9 MODEL: This is a pair of DB9 male and female adapter screw terminal block, provide great convenience for your life EXCELLENT PCB: Good quality PCB materials have reliability and miniaturization, good maintenance and interchangeability GOOD CONVERSION PERFORMANCE: Using selected good quality components, come with high conversion performance, smo-oth communication DURABLE USE: DB9 male female connector adapter come with stable structure, excellent performance and long service life Specification: Item Type: DB9 Male Female Connector Product Material: PCB Connector: DB9 For RS232 RS485 Package List:1 x Male Conversion Board1 x Female Conversion Board Package List 1 x Male Conversion Board 1 x Female Conversion Board