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: LotFancy Calltel Headset Headphone with Mic for Cisco IP Phone 7931 7940 7941 7942 7945 7960 7961, Plantronics Vista Modular Adapter M10 M12 M22 MX10, Coiled Cord with RJ9 Plug, Monaural Over-The-Head
Product feature: Compatible with CIS Cisco 7931 7940 7941 7942 7945 7960 7961 7962 7965 7970 7971 7975 7931G 7940G 7941G 7942G 7945G 7960G 7961G 7962G 7965G 7970G 7971G 7975G 6921 6941 6961 8961 9951 9971, 12VIP, 30VIP, CTS 500; PLT Plantronics M10, M12, M22 & MX10 Vista Modular Adapters, Desk Phones, Soft leatherette ear cushions for all day comfort, About 8-feet cord with RJ-9 modular plug lets you walk away from the phone while still wearing your headset, Polaris models are for phone systems with built-in amplifiers, Package Include: 1 x Calltel Headset with phone cord and 1 x User manual, If buy 10 items, get 10% discount off; if buy 20 items, get 12% discount off; if buy 40 items, get 15% discount off Here's how (restrictions apply)
Product price: $17.85
Product brand: LotFancy
Target attributes: Connectivity
Answer: attribute: connectivity
value: None
source: None