1). Built-in a high quality 24bit of audio decoder with stereo audio output.
2). Supports to play audio files of MP3 and WAV formats.
3). Equipped with a high quality 25Wx2 class D amplifier to directly connect with two 8 ohm speakers of 10-25 Watts, for left channel and right channel.
4). Built-in 16MB SPI flash memory and supports max. 32GB micro SD card.
5). Supports RS485 serial mode and button control mode.
6). In button control mode, playback of the one-on-one associated audio files are triggered by negative pulse to any of the 20 input terminals.
7). In button control mode, possible playback of 255 MP3/WAV audio files per 20 one-on-one associated folders through negative trigger.
8). In button control mode, four select-able triggering modes are provided through a configuration file.
9). Supports audio output to an external amplifier through the 3.5mm female audio jack.
10). Separate volume control for each sound channel (only for on-board amplifier).
11). Wide range for power input DC (12V - 24V).
12). Industry-grade design and strong anti-jamming capability.
13). Size: 115 x 90 x 40mm.
1). Power input: 12V-24V DC
2). Rated output: 25W×2 (RL= 8 Ω d =1%)
3). Noise Voltage: ≤50m V
4). Frequency response: 20-20KHz
5). SNR: ≥ 90dB
The terminals A(+) and B(-) are used to connect with a RS485 controller, while K1 through K20 represent Normally Open (N.O.) manual buttons. Please refer to the connection example below.