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You have until Feb 1, 2017 to return or exchange items purchased between Nov 1, 2016 and Jan 1, 2017. All other standard return policy conditions apply.
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The TAGS-FX Control Board for 1Si Quadcopter from Heli Max features Sensor Fusion Technology, which provides data from dual sources – a 3-axis gyro and a 3-axis accelerometer – and compensates for any actions except those you command. TAGS-FX corrects unwanted movement in yaw, pitch, and roll while also preventing drift in any direction.