Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Cheerson CX-Stars Mini 2.4 4CH 6 Axis Gyro RC Quadcopter UFO Drone with 3D Flips Headless Mode
Product description: Specifications: Brand name: Cheerson Model name: CX-Stars Item type: RC quadcopter Color: Black/Orange/Blue/Green optional Material: ABS Control channel: 4 channels Controller: 2.4GHz mode 2 Gyroscope: Six axis Motor: Coreless Motor Function: forward/backward, up/down, left/right, sideward flight, hovering, 3D flips, headless mode Remote distance: About 60 Feet Charging voltage: 3.7V Charging time: About 30mins Action time: About 4mins Quadcopter battery: 3.7V 80mAh Li-po battery (built-in) Transmitter battery: 2each 1.5V AAA battery (not included) Suitable for children above 14 years old Item dimension: 1.5 x 1.5 x Item weight: .5oz Package information: Package size: 5 x 4 x 4 Package weight: 5.3oz Notice: This RC drone is equipped with coreless DC motors, continuous using with different batteries is not suggested. This RC model is not a toy and is not suitable for children under 14 years old. Carefully read the instruction before any use, if you are a beginner, it's advisable to be assisted by an experienced adult. Caution for the battery: Don't over-charge, or over-discharge batteries. Don't put it beside the high temperature condition. Don't throw it into fire. Don't throw it into water. Package list: 1 * Cheerson CX-Stars RC Quadcopter 1 * Transmitter (mode 2) 2 * Pair Spare Propeller 1 * USB Charging Cable 1 * 3.7V 80mAh Li-po Battery (built-in) 1 * English user manual
Product brand: CHEERSON
Target attributes: Number of Channels
Answer: attribute: number of channels
value: 4 channels
source: product description
attribute: number of channels
value: 4ch
source: product title