Smaller than a pencil case, better take it with you when you're out. The Bluetooth Speaker that you could put into your pocket. It supports bluetooth connection, Aux-in Audio Cable and Micro-SD card(Maximum 32GB). Using Xiaomi bluetooth speaker, you can enjoy hands free talking. Small in size but loud in voice, its stereo loudness could reach to 90dB(A)@0.5m. Specifications Brand name Xiaomi Product name Mi Bluetooth Speaker Maximum output power 3W X 2 (4ohm, THD<1%) Loudspeaker Φ36mm, Driver X 2 Sound track 2.0 Bluetooth 4.0 Microphone HF Microphone Frequency response( -10dB) 85Hz - 20KHz Battery capacity 1500mAh Battery voltage 3.8V Charging time 2.5 hours Battery Life 8 hours ( 65dBA / 1m ) USB mains input 5V===2A Operating temperature 0℃-45℃(32℉-113℉) Size L168 * W24.5 * H58 mm Net weight 270g Color Gold, Blue, Pink