Product details of KK2.15 Mini Multi-rotor LCD Flight Controller V1.9S With Protect Case Box<br>Features<br>-The 2.1.5 is functionally the same as the 2.1. <br>Some minor changes have been made to the board including:<br>1. More Silk screening has been added to delineate polarity and functionality<br>2. Ground is now pulled from the Escs， which provides better reverse voltage protection.<br>3. Diode protection has been added to the buzzer to avoid damaging the board if you plug in power to the buzzer<br>4. Improvements have been added to the voltage sense accuracy<br><br>About the product<br>1. IC: Atmega644 PA<br>2. Gyro/Acc: 6050MPU InvenSense Inc.<br>3. Auto-level: Yes<br>4. Input Voltage: 4.8-6.0V<br>5. AVR interface: standard 6 pin.<br>6. Signal from Receiver: 1520us (5 channels)<br>7. Signal to ESC: 1520us<br>8. LCD size: 24*18mm<br>9. Voltage sensor: One red positive pin header for.<br>10. Input rail: Single row 2.54mm pitch pin header for input signal<br><br><br>Weight: 21g<br>Product Size: approx. 36mm x 36mm x 15mm<br>Specifications of KK2.15 Mini Multi-rotor LCD Flight Controller V1.9S With Protect Case Box<br>What's in the box:1 x KK2.15 Mini Multi-rotor LCD Flight Controller V1.9S With Protect Case Box<br>General Features:SKU	SU361ELAA55ITOANMY-10441557	<br>Gender	Unisex	<br>Size (L x W x H)	4x4x2	<br>Weight	0.045	<br>Warranty Period	No Warranty	<br>