The NRG Symphonie CDMA iPack is an add-on internet communications and continuous power supply module for the NRG Symphonie logger and was designed for use at sites where Verizon CDMA cellular service is available. Technology The NRG Symphonie CDMA iPack contains a rechargeable gel cell battery, recharging circuit, specialized cellular phone, modem and internet processor which enables the NRG Symphonie Logger to connect to your Internet Service Provider (ISP) through Verizon's CDMA network (typically found in North America) and transfer data as an email attachment to any desired email address on the internet. Connection The NRG Symphonie CDMA iPack mates to the NRG Symphonie Logger by connecting to a DB25 port located on the back of the NRG Symphonie Logger. The iPack and NRG Symphonie Logger essentially "sandwich together" and are then secured to the Symphonie Shelter Box (Item #3159) via 4 long screws. The battery recharging circuit is designed for use with an external 5-watt PV panel (sold separately) which connects to terminals on the side of the iPack. This robust configuration keeps the internal gell cell battery continuously charged assuring reliable logger data logging and transfer operations. Antennae Each NRG Symphonie CDMA iPack ships with one magnetic antenna mounting base, one omnidirectional spike antenna of unity gain (cell tower is close by), one omnidirectional 5dBi antenna (medium gain, cell tower is in general region), and mounting screws. The magnetic mounting base can accept either of the two omnidirectional antennae. For harsh sites and/or sites with marginal cellular coverage (distant cell tower, complex terrain), a rugged, higher gain Yagi (directional) antenna is recommended (Order Item 3124 or 3163). Accounts and Programming The NRG Symphonie CDMA iPack requires Verizon CDMA phone service and an ISP capable of handling dial-up connections. Connections are "circuit switched". Cellular and ISP user accounts will need to be obtained and the required settings for the accounts need to be programmed into the iPack before use. Once configured, exciting new options for performing wind assessment studies are now available -a Symphonie system in the USA can email wind data to Europe for example. Not sure which iPack you need? See our iPack comparison chart... Note: All NRG Symphonie iPacks are compatible with both Symphonie and SymphoniePLUS data loggers.