- Date display
- Accuracy: ±20 seconds per month
- Approx. battery life: 3 years on SR621SW
- Size of case / total weight
LTP-1180A.......................33.6 x 28.3 x 8.3 mm / 62 g
LTP-1181A.......................33.4 x 27.2 x 8.3 mm / 61 g
LTP-1180E.......................33.6 x 28.3 x 8.3 mm / 26 g