Compact design. 3W RMS. Built-in 300 mAh battery. Built-in microphone for phone calls. Memory card input. MP3 player. Built-in FM radio. Aluminium casing. LED light indicates functions, incoming calls, etc. Music playback up to 2.5 hours. Talk time approx. 4.5 hours. Standby time: up to 20 hours. All products are REACH, ROHS and CE certified.