Volthium’s Bluetooth Dongle adds Bluetooth support to their yellow-top batteries that have a communications port. Please note that the rack-mount and wall-mount batteries do NOT work with this Bluetooth dongle, it is meant for the group 24, 31, 4D, 8D batteries in 12/24/48 Volt (with a yellow top cover). The Bluetooth App can be found here: Android (Google) Playstore Volthium App Apple Store Volthium App Features Range of 40 feet Can be used alone Can be paired with the Communication HUB to read 4 batteries simultaneously Compatible with a wide variety of Volthium batteries
