The August MR240 is a Bluetooth receiver that will enable you to wirelessly play your music from your Bluetooth device to any speaker system and 30 pin Apple Dock:Using the standard 3.5mm audio jack cable included to connect to any Audio IN: from home speakers to portable ones, and even car stereo.Compatible with 30 pin Apple Docks you can easily play music wirelessly from your cell phone / PC to a music system with Apple Docking Station using a Bluetooth ConnectionNo more cables needed to play music whatever system you are using! With the August MR240 you will be able to play and control your music wirelessly using the native music player from the Bluetooth device you are using. The Built-in Microphone enables Hands free calls to stay always connected.The 2.402 - 2.480GHz frequency range will achieve a high quality transmission to fully enjoy listening to music wirelessly.Specifications: Bluetooth Version: Bluetooth 3.0+EDR Power Socket: Apple 30-pin Power Input: DC 5VmA Built-in Battery: 3.7V 120mAh Li-ion Battery Charging Time: 2.5 hours Working Time: Up to 7 hours Working Distance: Up to 30ft (Class II) Dimensions: 2.5x1.4x0.5 inches Weight: 0.8oz