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by Brand Names
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| Credit Card |
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Seiko |
DF-100N |
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| Released in | 1993 | Made in | China | Memory | About 150 records | ||
| Display | 1 line x 8 chars, 1 line x 10 digits | Keyboard | 36 flat keys | ||||
| Batteries | 1 x CR-2016 | PC-Sync | No | ||||
| Size/weight | 5.6 (W) x 8.6 (D) x 0.52 (H) cm. | ||||||
| Functions | Phone book, 10-digit calculator | ||||||
| Comment | Sold under SII name, a brand name of Seiko | ||||||
| With Cover |
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Seiko |
DF-3401 |
 User manual downloadSee the 'More info' page |
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| Released in | 1995 | Made in | China | Memory | 2 KB | ||
| Display | 2 lines x 12 dot-matrix chars. | Keyboard | 38 rubber keys | ||||
| Batteries | 1 x CR-2025 | PC-Sync | No | ||||
| Size/weight | 10.8 (W) x 6.7 (D) x 1.3 (H) cm / 62 g | Messages in |
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| Functions | Phone book, Unit conversion, 10-digit calculator | ||||||
| Comment | Same features as the DF-3400 | ||||||
| Without Cover |
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Seiko |
DF-1800 |
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| Released in | Unknown | Made in | Japan | Memory | 32 KB | ||
| Display | 3 lines x 19 dot-matrix chars | Keyboard | 44 rubber keys | ||||
| Batteries | 3 x CR-2025 (1 for backup) | PC-Sync | With a serial cable and software | ||||
| Size/weight | 13.1 (W) x 8.1 (D) x 1 (H) cm / 90 g | Messages in |
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| Functions | Phone book, Memo, 8-digit calculator | ||||||
| Comment | Well made but short of functions | ||||||
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Seiko |
DF-3400 |
User manual download See the 'More info' page |
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| Released in | Unknown | Made in | China | Memory | 2 KB | ||
| Display | 2 lines x 12 dot-matrix chars | Keyboard | 38 rubber keys | ||||
| Batteries | 1 x CR-2025 | PC-Sync | No | ||||
| Size/weight | 10.4 (W) x 6.3 (D) x 0.9 (H) cm / 42 g | Messages in |
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| Functions | Data bank, Unit conversion, 10-digit calculator | ||||||
| Comment | Only 3 functions, no buzzer but a 24-char display Same features as the DF-3401 |
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