The TXC Corporation 7M40000129 is an SMD Crystal Resonator with a center frequency of 40MHz, and ±10ppm frequency tolerance. It is RoHS compliant and has a 3225 size SMD package. It can be used in a wide variety of mobile and wireless applications such as Wireless LANs, Bluetooth, GPS, and TCXO. It also features a high shock and vibration resistant design. The 7M40000129 is an ideal component for accurate frequency control in various consumer electronics products.