1、STRONG INTERFERENCE RESISTANCE: RC Transmitter has 2.4G technology with 3 channels and strong anti interference capability. 2、HIGH SENSITIVITY: 1024GB sensitivity receiver ensures quick response and better control. 3、STABLE IN USE: Smooth and highly sensitive to control input, stable at a distance of more than 120 meters. 4、WIDELY COMPATIBLE: RC Radio Controller is compatible with various vehicles, suitable for RC car, RC boat. 5、WITH RECEIVER: 8166A remote control transmitter with 6618 receiver, more convenient and reliable to use. Item Type: RC Controller with Receiver Material: Plastic, Electronic Components Product Color: Black 8166A: Number of Channels: 2‑3 Channels Suitable for Machine Type: Car and Boat Data Resolution: 1024GB Transmit Power: Less Than 20dbm Modulation Mode: GFSK Low Voltage Alarm: Less Than 4.4V, The Green Light Flashes Slowly Battery Power Supply: 4 x 6V 1.5AA Batteries (shipped Without Batteries) Dimension: Approx. 160x91x223mm / 6.3x3.6x8.8in Distance: 120m/131.2yd Whether with Gyroscope: Without 6618: Number of Channels: 2‑3 Channels Suitable for Machine Type: Car and Boat Modulation Mode: GFSK Data Resolution: 1024GB Power Supply: 4.2‑6V Dimension: Approx. 34.2x22.6x13mm / 1.3x0.9x0.5in 1 x RC Transmitter 1 x Receiver 1 x Instruction Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.