Futaba R304SBE 4-Ch 2.4G TFHSS Telemetry Rx. Power requirement rated voltage: 4.8-7.4V. Usable voltage: 3.5-8.4V. System: T-FHSS (auto detection) W/ SBUS2 port. Futaba has a long history of providing reliable, high-quality products that last. That longevity also allows for an abundance of available information about most generations of Futaba products. After 50+ years of innovation in the hobby industry, Futaba is especially proud of the distinguished reputation we hold with hobbyists. We aim to maintain that regarded level of consumer confidence. 3.13 x 2.5 x 1.13 inches. 14 – 16 years. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your feedback very important to us, after you get your package and you are. Satisfied with our service. If you have any problem with your order / any questions please before leave any type of feedback. Thank you for shopping at our store.