Memory card type: expansion card is not supportedModel: M12Screen size: 1.8Gift use: points redeemed for gifts, business gifts, advertising gifts, promotional gifts, conference gifts, festive gifts, commendation gifts, public relations gifts, personal giftsScreen resolution: 160128Interface: Mini USBHeadphone jack: 3.5Additional features: watch function, support bluetooth, FM radio function, e-book reading, head-mounted MP3Menu language: Chinese EnglishBattery type: lithium batteryMemory capacity: 4GB, 8GB, 16GB, 32GBPacking list: recording product, headphone cable, manual, data cable, warranty card, packing box.Supported audio formats: MP3, WAVApplicable crowd: students, sports people, music enthusiasts, teachers, trainers, business people, public security personnel, lawyers, reporters, public figures, elderly caregiversExpansion card: not supportedBattery capacity: 150mAhOperation mode: touch + buttonAttribute 1: mp4Screen color: LCD