FEATURES - GY611:

Super narrow pulse drive system substantially improves servo response
Microcomputer high-speed arithmetic processing substantially improves gyro response
High-resolution 12-bit A/D (Analog to Digital) accurately converts sensor output to a Digital Signal
SMM (Silicone Micro Machining) micro-machining mechanical parts and systems right on a silicone chip and also low-back aeroform case improves vibration resistance and neutral characteristic
AVCS (Angular Vector Control System) (same as Heading Hold) system requires a high-precision angular velocity detection function and extremely small output drift by using a new type of gyro sensor. This minimizes rudder neutral position drift during flight and eliminates the need to trim the rudder during flight.

FEATURES - BLS251 :

Equipped with a Brushless motor that lasts longer and operates at a lower temperature than Brushed motors
Compatible with Futaba GY601 and GY611 gyros
Samarium Cobalt magnets and dual ball bearings
Same power consumption and centering as Digital servos equipped with Brushed motors
Standard size

INCLUDES: Futaba GY611 sensor, control amp, BLS251 servo, mini screwdriver, 3 sections double sided tape and instruction sheet

SPECS:

GY611 Ratings: Yaw-axis stabilizer for helicopter (rate gyro)
Display Device: 8-character dot matrix Liquid Crystal Display
Operating Voltage Range: DC 3.8V to 5V
Current Drain: 70mA @ 5.0V, including sensor
Dimensions: Amp 2.2"x 1.2"x 0.59" (57 x 32 x 15mm)
Sensor 1.2"x 1.2"x 0.71" (30mm x 30mm x 18mm)
Weight: Amp 1.19oz (34g); Sensor 1.05oz (30g)

BLS251 Servo Ratings:

Dimensions: 40 x 20 x 36.8mm
Weight: 61g
Speed: 0.06sec/60º (at 4.8V )
Torque: 3.8kg-cm (at 4.8V )