Portable Mini 400 DX4 Magnetic Stripe Card Reader Magstripe Credit/Debit MiniDX4 data collector Type: MagStripe Reader Interface: USB Color: Black Track: 1, 2 & 3 Card Format: ISO 7811, AAMVA Head Duty Cycle (Passes): 1,000,000 Encryption: Yes Dimensions: L 7.8 x W 2 x H 2.65 cm