The Astatic 878HL Desktop Microphone is intended for use with commercial paging systems in schools, restaurants, warehouses, medical facilities, etc. The microphoe is built tough and features an omnidirectional pickup pattern for a generous, forgiving audio pickup area. A programmable, push-to-talk and lift-to-talk switch is provided and flexible output impedance makes the 878HL flexible for use with most paging systems and amplifiers. The 878HL is supplied with 2.1m (7 ft.) of four-conductor, two-shielded cable, wired normally-open for relay control.
| Transducer | Dynamic |
| Polar Pattern | Omnidirectional |
| Frequency Response | 80Hz to 12kHz |
| Dynamic Range (Typical) | Not Specified By Manufacturer |
| Signal-to-Noise Ratio | Not Specified By Manufacturer |
| Maximum Input Sound Level | Not Specified By Manufacturer |
| Power Requirements | None, Dynamic |
| Output Impedance |
HiZ: 40k ohms
LoZ: 400 ohms |
| Output Connectors | Four-conductor, two-shield |
| Pad | No |
| Low Frequency Roll-Off | No |
| Dimensions (WxHxD) | Not Specified By Manufacturer |
| Weight | Not Specified By Manufacturer |