Futaba GY240 - The GY240 is ideal for electrics and 30-size machines. Features single-gain adjustable trim, with 70Hz operation. Measures 1" x 1" x 0.8" (27 x 27 x 20 mm), and weighs just 0.88 oz (25 g).
Futaba GY401 - The GY401 is great for just about any size helicopter, if you are flying FAI or 3D. Features remote gain feature and transmitter-controled switching to AVCS. It's operation is almost 4 times faster (270Hz) than conventional gyros. The 401 measures 1" x 1" x 0.8" (27 x 27 x 20 mm), and weighs 0.95 oz (27 g).
Hitec HG-5000 w/ HSG-5083MG Micro Digital Servo Combo - This high performance MEMS Gyro is extremely compact and light weight, and is optimized
for 400, and 600 size EP helis. It has a remote gain adjustment, a built-in temp sensor, and a self diagnosis function. It also has universal selectable signal for both digital and analog servos, and has a
low power consumption of only 20mA. Also, with its simple led display, and easy data setting, it's really easy to use.
Specs on included HSG-5083MG Digital Servo:
Dimensions: 29mm x 13mm x 30mm
Speed: 0.07 sec @ 4.8V
Torque: 20.9 oz/in