First-ever monitor with interchangeable optical lens capability ? allowing you to customize viewing angle and zoom * Large 3.5" full color LCD display in sleek, compact unit with retractable antenna, with sound-activated LED display * Remote pan, tilt and digital zoom * Long battery life: 10 hours on power-saving mode, 6 hours with screen on * One (1) Optical Zoom Lens included. Wide Angle Lens sold seperately