redant 4th gen 1.8 inch screen real 16gb 32gb built-in memory mp3 music player with fm radio e-book mp3 player mp 3 mp-3

important notice about memory size this mp3 does not have built-in memory and requires an additiaonl micro sd card. so we supply the three options on memory size. 1. "other", it means no micro sd card is included. 2. "16gb", it means 16gb micro sd card is included. 3. "32gb", it means 32gb micro sd card is included. related instructions using the latest operating system,system is very stable,it is product music playing time 30hours support mp3 and also wma, wmv, asf, wav,...