Designed for office and industrial environments, these handsets deliver high-security, high-quality voice communications over a dedicated, encrypted wireless network. With 20-plus hours of talk time, they give users reliable access to PBX features like hold, conferencing, and messaging. For office workers, the 3720 offers core functionality at a budget-friendly price. The 3725 adds a backlit keypad, large color display, text messaging, and liquid and dust protection.