Dimensions/weightSoundTouch™ SA-4 amplifier:10.8 cm H x 36.2 cm W x 14 cm D (5 kg)SoundTouch™ wireless adapter:5.1 cm H x 23.9 cm W x 6.4 cm D (0.34 kg)SoundTouch™ controller:10.5 cm Ø 2.8 cm D (0.23 kg)Additional detailsSoundTouch™ SA-4 amplifierIncludes Wi-Fi®Wireless network compatibility: 802.11 b/gSupported audio formats: MP3, WMA, AAC, Apple Lossless100W per channel, into minimum 6 ohmsSoundTouch™ controllerOLED displayWireless range up to 70 ftWireless technology: Bluetooth® LEBattery type: 4 AA batteriesBattery life: 6 – 12 monthsnputs/outputsSoundTouch™ SA-4 amplifierAC powerVolume control connectorSpeaker outputsBoseLink® outputBoseLink inputSoundTouch™ wireless adapterAC powerEthernet portUSB inputBocinas:Bass-reflex designRecommended power: 10-150 wattsImpedance rating: 4-8 ohmsRemovable grilleCompact, horizontal design to save spaceBlack vinyl finish