The Citizen CL-S521 II is a high-performance, direct thermal desktop label printer designed for industrial and commercial use, featuring a 32-bit RISC processor and a durable, all-metal print mechanism. It is designed for high-speed, reliable printing in retail, logistics, and healthcare applications. 

Key Specifications:
Print Technology: Direct Thermal (No ribbon required)
Resolution: 203 dpi (8 dots/mm)
Print Speed: 6 inches per second (150 mm/s)
Maximum Print Width: 4 inches (104 mm)
Media Width: 0.5 inches to 4.6 inches (12.5 mm to 118 mm)
Media Capacity: Holds rolls up to 5 inches (127 mm) in diameter
Memory: 32MB RAM, 16MB Flash (4MB available for user)
Interfaces: USB (version 2.0, full speed) and Serial (RS-232C) standard
Optional Connectivity: Internal Ethernet, Parallel (IEEE 1284), or Wireless LAN (802.11b/g)
Emulation: Cross-Emulation™ (automatic switching between Zebra® ZPL2®, Datamax® I-Class™ & DMX400, and EPL2®)
Dimensions & Weight: 231 x 289 x 183 mm (W x D x H); 3.6 Kg
Case Design: Hi-Open™ industrial ABS case with vertical opening (compact footprint)