Brand New Open Box Sealed Home Cell Phone Signal Booster, The Pebble By Casa Systems Complete System.

Nothing has been used, but the instructions were misplaced.  You can find a copy here: 

https://www.sprint.com/content/dam/sprint/commerce/devices/sprint/casa-pebble/documents/Casa%20Pebble%20User%20Guide%202019%2010%2014.pdf

Manufacturer Description:

Casa Systems Pebble Apex Lifestyle Small Cell Router P/N LTE-1001-41 Model AP1000-41 The Pebble unit can be connected to the network via an Ethernet or Wi-Fi connection. The Ethernet connection is plug-and-play. The Wi-Fi connection requires setup. Designed to provide home or small office coverage in low RF coverage areas -Is a low-power RF emitting eNodeB for LTE RAN. -The Pebble unit supports one LTE radio sector with two 50 MW (20 dBm) radio streams (4G) that is responsible for radio transmission and reception from UEs in an LTE network. -Provides radio coverage for LTE enabled devices and or handsets within a residential or enterprise coverage area. Incorporates all the capabilities and functions of a standard eNodeB. -Ease of installation: No dedicated LTE Backhaul needed. Connects to home broadband network using Ethernet or Wi-Fi. -Easy integration: Uses X.509 digital certificates to authenticate with the service provider's core network. -Uses TR-069 over IPsec tunnel for integration with back-end management systems. -Cost effectiveness: Supports Plug-and-Play provisioning, does not require a dedicated installation, and uses existing infrastructure with minimal intervention.