Epson C31CK00A9991 vs Epson C31CJ99A9981: Specification Comparison
Both the Epson C31CK00A9991 (TM-P80II) and the Epson C31CJ99A9981 (P20II) are direct thermal mobile receipt printers in the same product class, aimed at point-of-sale and field-service deployments where compact, wireless printing is required. The TM-P80II prints on 3-inch media with Bluetooth connectivity, while the P20II handles 2-inch media with Wi-Fi and a broader wired interface suite. Buyers cross-shopping these units are typically evaluating print width against their receipt roll stock, connectivity protocol fit, and speed for their specific POS or field-service environment.
In This Guide
- Which printer matches my receipt roll width and how fast does each unit print?
- Which connectivity options does each printer support, and how do they integrate into existing POS or field networks?
- How do the physical design, power arrangement, and stated reliability compare for mobile or high-volume use?
- Which should you choose: the C31CK00A9991 or the C31CJ99A9981?
- Side-by-Side Specs
- FAQ
Which printer matches my receipt roll width and how fast does each unit print?
The C31CK00A9991 (TM-P80II) prints on 3-inch (approximately 80 mm) media at a stated speed of 236.2 inches per minute (ipm). The C31CJ99A9981 (P20II) is designed for 2-inch media and is rated at 500 mm/s. Converting for rough comparison: 236.2 ipm equals approximately 100 mm/s for the TM-P80II, while 500 mm/s is the P20II's stated figure — giving the P20II a substantial raw speed advantage on paper. However, the two units serve different roll widths: 3-inch rolls for the TM-P80II and 2-inch rolls for the P20II. Print width is a hard compatibility constraint — neither unit can substitute for the other if the deployment's receipt stock is already standardized. Buyers must confirm roll width first before treating speed as a differentiator.
Which connectivity options does each printer support, and how do they integrate into existing POS or field networks?
The C31CK00A9991 (TM-P80II) offers Bluetooth wireless plus a wired interface, making it suited for one-to-one paired mobile POS scenarios — typical of handheld terminal or tablet-based retail setups where Bluetooth range is sufficient. No Wi-Fi, USB, Ethernet, Serial, or Parallel interface is specified for this model.
The C31CJ99A9981 (P20II) supports Wi-Fi along with USB, Ethernet, Serial, and Parallel interfaces. This breadth of connectivity makes the P20II significantly more flexible for fixed or semi-fixed installations where wired fallback, network-based printing queues, or legacy serial/parallel POS systems are in use. A wireless security mode is noted in the specs, though specific protocol details (e.g., WPA2) are not provided in the supplied data. Buyers integrating into enterprise or multi-terminal networks will find the P20II's interface range more accommodating.
How do the physical design, power arrangement, and stated reliability compare for mobile or high-volume use?
The C31CK00A9991 (TM-P80II) is described as a mobile cradle form factor with a battery cradle enabling cordless operation, positioning it for on-the-go or roaming POS use. No physical dimensions are provided in the supplied specs.
The C31CJ99A9981 (P20II) also lists a cradle form factor and provides physical dimensions of 3.1 inches × 4.7 inches × 1.8 inches. It includes an integrated cutter, a feature not specified for the TM-P80II. The P20II's specs state a reliability rating of 10 million printing lines, giving buyers a concrete durability benchmark; no equivalent figure is provided for the TM-P80II. Both units carry a standard 1-year limited warranty, with optional extended service noted for the P20II. The P20II also carries a RoHS compliance notation; no equivalent environmental certification is listed for the TM-P80II in the provided specs.
Which should you choose: the C31CK00A9991 or the C31CJ99A9981?
Our take: The C31CK00A9991 (TM-P80II) is the stronger choice when a deployment is standardized on 3-inch receipt rolls and relies on Bluetooth-paired mobile terminals such as handheld tablets or smartphones. The C31CJ99A9981 (P20II) is the stronger choice when 2-inch roll stock is in use, higher raw print throughput matters (500 mm/s vs. approximately 100 mm/s equivalent for the TM-P80II), or multi-interface flexibility is required — the P20II supports Wi-Fi, USB, Ethernet, Serial, and Parallel versus the TM-P80II's Bluetooth-plus-wired configuration. The P20II also adds a built-in cutter and a stated 10-million-line reliability rating not present in the TM-P80II's specs. Roll width is the threshold decision: buyers locked into 3-inch stock must select the TM-P80II; those on 2-inch stock and prioritizing network integration or throughput should favor the P20II.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Epson C31CK00A9991 | Epson C31CJ99A9981 |
|---|---|---|
| Model | TM-P80II | P20II |
| SKU | C31CK00A9991 | C31CJ99A9981 |
| Print Width | 3 inches | 2 inches |
| Paper Width | 3 inches | 2 inches |
| Print Method | Direct thermal | Thermal line printing |
| Print Speed | 236.2 ipm (~100 mm/s) | 500 mm/s |
| Print Resolution | 203 dpi monochrome | — |
| Wireless Interface | Bluetooth | Wi-Fi |
| Wired Interfaces | Wired (type not specified) | USB; Ethernet; Serial; Parallel |
| Form Factor | Mobile cradle | Cradle |
| Power | Battery cradle (cordless) | — |
| Built-in Cutter | — | Yes |
| Dimensions | — | 3.1" x 4.7" x 1.8" |
| Reliability Rating | — | 10 million printing lines |
| RoHS Compliant | — | Yes |
| Warranty | 1-year | 1-year (optional extended) |
Frequently Asked Questions
Which should you choose: the C31CK00A9991 or the C31CJ99A9981?
The C31CK00A9991 (TM-P80II) is the stronger choice when a deployment is standardized on 3-inch receipt rolls and relies on Bluetooth-paired mobile terminals such as handheld tablets or smartphones. The C31CJ99A9981 (P20II) is the stronger choice when 2-inch roll stock is in use, higher raw print throughput matters (500 mm/s vs. approximately 100 mm/s equivalent for the TM-P80II), or multi-interface flexibility is required — the P20II supports Wi-Fi, USB, Ethernet, Serial, and Parallel versus the TM-P80II's Bluetooth-plus-wired configuration. The P20II also adds a built-in cutter and a stated 10-million-line reliability rating not present in the TM-P80II's specs. Roll width is the threshold decision: buyers locked into 3-inch stock must select the TM-P80II; those on 2-inch stock and prioritizing network integration or throughput should favor the P20II.
Is the C31CK00A9991 or C31CJ99A9981 better for a Bluetooth-based mobile POS setup?
The C31CK00A9991 (TM-P80II) is specified with Bluetooth wireless connectivity, making it the direct fit for Bluetooth-paired mobile POS terminals. The C31CJ99A9981 (P20II) does not list Bluetooth in its provided specs — its wireless interface is Wi-Fi. If your POS system connects via Bluetooth, the TM-P80II is the applicable unit.
Which printer is faster — the C31CK00A9991 or the C31CJ99A9981?
Based on stated specs, the C31CJ99A9981 (P20II) is rated at 500 mm/s, while the C31CK00A9991 (TM-P80II) is rated at 236.2 inches per minute (approximately 100 mm/s). The P20II's stated speed is substantially higher. Note that these two models print on different media widths (2-inch vs. 3-inch), so speed alone should not drive the selection if roll width compatibility is the binding constraint.
Does either printer include a built-in cutter?
Yes — the C31CJ99A9981 (P20II) is specified with a cutter. The C31CK00A9991 (TM-P80II) does not list a cutter in the provided specifications. Deployments where automatic receipt cutting is required should factor this into the selection.
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