This is the Most Powerful USB dongle provided to protected software with following features: Top security (CC EAL5+) 32bits ARM smart chipset, super large space (256Kb/512Kb(optional)) which up to 3000/6000(optional) licenses can be stored in, Virbox EL5 is future-proofed dongle in software protection area with best customer experience and are widely selected by thousands of software developer. IE version and Rechargeable Real-Time Clock version are also available for EL5 dongle.