Insert card reader,can connect with weigeand 26 card reader outside. Uers capacity/events:10,000/15,000Communications: RS232 or RS422Card type: ID or IC Read range: 5~12cmPower supply: 12V DC,150 mAOperation temperature: 0℃ ~45℃Humidity: work:40%RH~90%RH; storage:20%RH~90%RH