EXTENDED OPERATION - Provides a reliable 4.44Wh 3.7V 1200mAh rechargeable lithium-ion battery, ensuring prolonged usage for Saramonic WiTalk intercom systems during critical communications. VERSATILE COMPATIBILITY - Designed for seamless integration with WiTalk-DMH, DRH, SMH, and SRH wireless intercom headsets, as well as the WiTalk-Hub base station, maximizing your existing equipment's potential. OPTIMAL PERFORMANCE - Operates efficiently within a temperature range of 14 to 122°F (-10 to 50°C), guaranteeing consistent power delivery in diverse environmental conditions for intercom use. DURABLE DESIGN - Built to withstand storage temperatures from -4 to 131°F (-20 to 55°C), ensuring the battery maintains its integrity and performance even when not in active use.