Instruction: Given the title, description, feature, price, and brand of a product and a set of target attributes, extract the value of each target attribute from the product information. Output the extracted value and the corresponding source (e.g., title or feature) denoting where the value is extracted.

Input:
Product title: Original Helic Max Sky Walker 1336 Mini 2.4G 4CH 3D Eversion Flying and Running RC Quadcopter with Ball Shaped Protector
Product description: Specifications: Brand name: Helic Max Item NO.: Sky Walker 1336 Material: ABS Frequency: 2.4G Colour: Green and Orange optional Suitable age: above 14 years old Functions: Sideward flight,turn left/right,hover,forward/backward,with light,up/down, and rolling 360° Control distance: about 50m Battery: 3.7V 200mAh Charging time: about 60mins Flying time: about 6mins Remote battery: 4 * AA dry battery (not included) Battery dimension: 30 * 19 * 7mm Quadcopter dimension: 100 * 100 * 95mm Quadcopter weight: 17.7g Package information: Package size: 18.6 * 16 * 12.3cm / 7.3 * 6.3 * 4.8in Package weight: 293g / 10.3oz General gift box package 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. Notice: 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. This RC drone is equipped with coreless DC motors, continuous using with different batteries is not suggested. Package list: 1 * Helic Max Sky Walker 1336 Mini RC Quadcopter with Ball Shaped Protector 1 * Transmitter(mode 2) 1 * 3.7V 200mAh Li-po Battery 2 * Pair of Spared Propellers 1 * USB Charging Cable 1 * English User Manual
Product feature: It can be 360 inverted flying., Switching among flying, running and climbing modes easily by just one button., Ball shaped protector enables it to fly on any kind of land., 2.4G 4CH transmitter for your easy control., Compact and lightweight design.
Product brand: GoolRC
Target attributes: Number of Channels
Answer: attribute: number of channels
value: 4ch
source: product title
attribute: number of channels
value: 4ch
source: product feature