The iB005N-SMA is no longer manufactured and has been replaced with the S1-SMA.
The S1 USB doesn’t use batteries and instead uses USB for power. The USB isn’t used to set up the beacon and the manufacturer smartphone app, via Bluetooth, is used instead. The ‘SMA’ means it has an external rather than PCB antenna which moves the antenna away from the device supplying the USB power thus providing better Bluetooth radio signal and longer range. The S1 is also available without an external antenna.
We have a few iB005N-SMA remaining in stock of you particularly need that model.