This is our best "guess" description of this item as no specific data sheet is generally available. While we believe the info below is correct YOU are the sole determination if our information is correct or not and if this will work for you intended purchase. Any Radio Astronomy use, WiFi or ham radio use is beyond our knowledge. 

KMW KASPTRS82000 Directional Coupler Bias-T 2496–2690 MHz 7/16 DIN LTE WiMAX

KMW KASPTRS82000 directional coupler with integrated Bias-T. Telecom-grade RF component designed for 2.5 GHz LTE/WiMAX infrastructure. Provides mainline RF pass-through, coupled sample port, and DC injection for tower-mounted equipment. 

Manufacturer: KMW Communications (KMW U.S.A. Inc)
Model: KASPTRS82000
Type: Directional Coupler with Bias-T

Frequency Range: 2496 – 2690 MHz
Impedance: 50 Ohm
RF Path: Mainline pass-through (BTS to antenna)
Coupled Port: Yes (RF sample/monitor output)
Bias-T: Yes (DC injection onto RF line)
DC Pass: Yes
Typical DC Current Capability: up to ~2.5A

Mainline Connectors: 7/16 DIN Female (long neck for panel mounting)
Coupled Port Connector: N-Type Female (typical for series)

Operating Temperature: –40°C to +65°C
Ingress Rating: IP66 / IP67

Used in cellular base station systems including LTE and WiMAX in the 2.5 GHz band. 

Exact RF performance parameters such as coupling factor, insertion loss, return loss, and PIM are not published for this model.

Might be unused but we are calling it used / surplus telecom equipment. May show normal signs of prior installation. See photos for actual condition.