The product is a set of two Renata 379 1.55v watch coin cell batteries, specifically SR521SW. These silver oxide non-rechargeable coin cell batteries have the longest expiry date and are suitable for various sound and vision devices. The batteries are compatible with models such as the 377, SR626, and SR626SW, making them versatile for different applications. With a voltage of 1.55V and a coin/button cell sub-type of SR626/SR626SW, these high-quality batteries from Renata are reliable and efficient power sources for watches and other electronic devices.
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