This sleek new antenna design improves upon intercom stability and even secures the intercom distance while updates to the hardware allow for an even more robust general performance updates. Specifications: Talk time: 13 hours. Operating temperature: -10°C - 55°C (14°F - 131°F). Dimensions: Main module: 98 mm x 56. 2 mm x 31. 5 mm (3. 9" x 2. 1" x 1. 2"). Speaker: driver unit 40 mm - thickness 6. 5 mm. Boom microphone: length 190 mm. Wire between speakers: length 555 mm. Weight: Module: 61.