Support UHF tag protocol ISO18000-6C Support ios, android and other intelligentsystem platforms. Communication interface: 3.5mm audio interface (common headphone jack) Nyeem nrug: 50cm（depend on tag size） Work time: continuous 3 Access Control Clamshell Card,query over 30000 sij hawm. Battery capacity：550mA Charge method：USB 5V/0.5A，charge time 2 Access Control Clamshell Card. Work environment temperature: -20℃~+60℃ Material: ABS+PC engineer plastic. Qhov Coob：42×48×15mm Weight：35g