This is the Futaba R334SBS 2.4GHz TFHSS 4-Channel SBus-2 Receiver. FEATURES Designed for use with Futaba surface transmitters using TFHSS and TFHSS-SR technology TFHSS bidirectional telemetry Programmable and compatible with S.Bus2 systems Normal/high-speed modes (auto detection), normal mode accepts any type of servo, high-speed mode only accepts digital servos including BLS servos High voltage Dual antenna diversity Battery fail safe One year limited warranty through Hobby Services beginning at date of purchase INCLUDES Futaba R334SBS 2.4GHz TFHSS 4-Channel SBus-2 Receiver SPECIFICATIONS Operating Voltage: 3.7-7.4V Size: 1.3 x 0.88 x 0.44 (33.9 x 22.3 x 11.3mm) Weight: 0.26oz (7.3g)