The T-Echo Card also features GNSS capabilities and an integrated display. LilyGo's new T-Echo Card leverages this technology to offer a versatile feature set for outdoor and monitoring applications. To extend battery life in the field, the T-Echo Card incorporates a small 0.25 W solar panel. While insufficient to power continuous data transmission and active sensing indefinitely, it can trickle-charge a battery. The T-Echo Card is currently available directly from the manufacturer for just over $58.