Large Keys and Key LED Light: The keys on the flip phone are large enough for easy use. The button is equipped with background light, which is convenient for use in dark environment at night. SOS Function: In case of emergency, you can use SOS function to get help immediately. 9 home numbers can be set, and one touch dialing can save time and worry. You can dial with one touch without opening the address book. Frequency Band: The 2G 2.4 inch screen flip phone supports 2 band GSM900/1800. Please check with the operator of your SIM card whether it supports 2G network. The product has been completely unlocked, but the operator needs to support the product. Rich Functions: N509 2G flip phone supports music and video player, picture browser, recorder, calendar, alarm clock, computer, flashlight, stopwatch, call blacklist, call whitelist and other functions. HD Color Display: 2G unlocked flip phone has a 2.4 inch HD color display, supports dual SIM cards and a memory card with a maximum capacity of 16GB (not included). Clear keys and numbers are easy to dial. Powerful speakers ensure that every call is loud and clear.