Power supply and performance 1.7 15V power supply (at 12V 3A, the maximum output power is 2x15W) Size and mounting Board size: 7.9 cm x 4.5 cm Fixing hole distance: 7.4 cm x 4 cm Audio input and output AUX audio input Low power consumption On power on, maximum default volume Output: 2x4/8 ohms 10W/15W Supports external first generation antenna Knob switch and volume control Codec and wireless support QCC5125 supports /AAC//APTXLL/APTXHD/AD/LDAC Use scenarios Build a compact DIY Bluetooth speaker or multimedia enclosure using a 12 V supply and the 2x15 W capability Upgrade a small home audio or embedded project that requires AUX input, adjustable volume, and 2x15 W output in a compact board Create a wireless streaming device that can use an external antenna and benefit from AAC, APTX LL, APTX HD, LDAC compatibility