The Quantum Instruments Qflash Model T5D-R is a powerful and versatile flash unit designed for professional photographers. This compact and lightweight flash offers advanced features such as TTL compatibility, high-speed sync, and wireless connectivity. With a guide number of 165 ft at ISO 100, this flash provides excellent lighting for various photography situations. The Quantum Qflash Model T5D-R is compatible with Quantum power packs, delivering reliable and consistent power for extended shooting sessions. Manufactured by Quantum, this flash unit is a top choice for photographers looking for quality and performance in their lighting equipment.