Features: 1. Medium frequency shook、 deep bass. 2. 3.5mm gold-plated plug for multiple platforms. 3. Compatible with: Mobile Phones\/ computers\/ mp3\/ mp4\/ tablet PC. 4. Small in-ear design、 tie-in and transparent soft glue earmuffs、 fit your ear type、 wearing more comfortable. Specifications:          General Specification             Brand         HUAST             Model         1216             Color         Black、 Yellow、 Purple             Cable Length         2.5m             Wearing Type         In-ear           Technical Parameters             Conectivity Interface         3.5mm             Receive Sensitivity         42dB             Impedance         32Ω             Frequency Response         20-2000Hz    Package  Included:                   1x HUAST-1216 Earphone