Futaba FUTM0858 SBS-01S Servo Telemetry Sensor SBus-2

Monitors and displays in-flight current, operating angle and internal temperature of up to two S.Bus2 servos
Sends an alarm that can be activated at the transmitter if servo is not connected or becomes disconnected
Also sends an alarm if receiver is left on
Allows pilot to create a log file for each servo using a telemetry equipped transmitter by downloading the Telemetry Log Converter from futabarc.com
One year limited warranty beginning at date of purchase thru Futaba

SBS-01S S.Bus2 Servo Sensor with Instruction Sheet

Weight: 0.3oz (9.6g)
Length: 11.8" (300mm)
Voltage: 3.7 - 7.4VDC
Detection Item: current (~DC10.0A)
Operating Temperature: -10° - 115°C