Brand N/A Model V28 Quantity 1 Color Black + silver Material Aluminum Internal Storage 8 GB Memory Card Type NO Max Extended Capacity NO Recording Time 10 Hour Record Audio Format MP3 Audio Formats MP3 Bitrates 128Kbps~192Kbps Built-in Speaker Yes PC Interface Mini USB Battery Nuilt-in 300mAh rechargeable battery Other Features Storage mode: immediate storage; Interfaces: 1 x 3.5mm earphone jack 1 x microphone jack 1 x mini USB port; Built-in microphone; External microphone cable and 3.5mm universal microphone jack; SNR: 80db or above; Earphone playing time: 12 hours; Speaker playing time: 5 hours; System supporting: Windows 98 / 2000 / ME / XP / Vista / Linux; Operation Temp: -20 Celsius degrees~+40 Celsius degrees Packing List 1 x Voice recorder 1 x USB cable (80cm) 1 x 3.5mm earphone cable (104cm) 1 x Microphone cable (95cm) 1 x Telephone adapter 1 x Call cable (20cm) 1 x Audio cable (32cm) 1 x English user manual