Amplifier, Super Mini Stereo 3 Watts/ChannelAdditional Notes:* Super Mini 3 Watt/Channel Stereo* Class D Amplifier Using The PAM8403 Chip.* Power: 2.5-5.5 Volt DC (6 Volt Max) 5 Volt Typical* 5 Volt From a USB Port, 3x 1.5 Volt Batteries or 3 Volt Lithum Cell* Output: 3 Watt/Channel @ 4 Ohm Load/5 Volt Supply* SNR: 80 db* Input: Line Level.* Dimensions (LxWxH): 7/8″x 11/16″x 1/8″ MPJA33087 MI