With its stylish, thin design, the Apple Watch Series 6 40mm fits wrists of all sizes. With a strong S6 dual-core processor and up to 18 hours of battery life, you can rely on dependable performance. With its integrated health and fitness tracking features, keep tabs on your vitals and active minutes. 32GB of ROM 1GB of RAM Display size: 1.78 in. Dimensions: 40 mm Li-Ion 303 mAh battery