Micro Headlock Gyros from Etronix. Designed to improve your helicopter's balance & make flying easier. Features Dimensions 20mm x 20mm x 10mm Weight 5.7g with plastic case Operation voltage 4.8v-6.0v Remote gain control Heading hold / lock Low drift Hi Spec sensor Adjustable gain option when remote gain not used Simple Very lightweight Manufacturer: Etronix Micro Model/ Part No: ET0080 Micro Headlock Gyros