ECS ECS-33B2 SMD Crystals offer low first-year aging of ±2ppm in an industry-standard 3.2mm x 2.5mm x 0.8mm ceramic package. These miniature crystals feature a 10MHz to 54MHz frequency range and fundamental mode of oscillation. The series is RoHS compliant and has a gold (Au) termination finish. ECS ECS-33B2 SMD Crystals are ideal for wireless applications such as the Internet of Things (IoT), wearables, smart home sensors, BLUETOOTH® Low Energy, and Wi-Fi®.