TDA3116D MONO CHIP: Adopts TDA3116D MONO Amplifier Board chip, ensures high-quality sound.MULTI-PROTECTION: Over-voltage protection, under-voltage protection, overheating protection, short-circuit protection and DC detection.GREAT SOUND ENJOYMENT: Distortion is significantly reduced, giving you a great hearing enjoyment.HIGH OUTPUT POWER 2*50W: Mono power up to 2*50W produces a shocking stereo surrounding sound.SINGLE CHANNEL: Single-channel bring you an excellent using experience.Product name: Two-channel power amplifier module TPA3116D Bluetooth audio 2*50WAppearance size PCB: 77x61x25mm (hole spacing 69x53mm); shell: 94x78x33mmWeight module weight = 46g: acrylic shell weight = 66g (including screw accessories)Working mode: Class D power amplifier (PWM modulation)Number of channels: two channelsWorking voltage: DC5V~26V (recommended to use 12V, Greater than 12V need to install heat sink)Quiescent current: Less than 35mA (DC12V power supply)Shutdown current: Less than 0.4mAWorking temperature: 40~85℃Output power: 15W/4x2(12V): up to 50Wx2 ( Greater than 15Wx2 need heat sink) (8 ohm speakers are not recommended to use Greater than 24V power supply) DC=24V, R=8Q, @1khz B, P=40WDC =21V, R=8Q, @1khz B, P=30W (4 ohm speakers are not recommended to use Greater than 21V power supply) DC=21V, R=40, @1khz By, P=50WDC=15V, R=40, @1khz B, P=25WDC=12V, R=4Q,@1khz B, P=17WDC= 8V, R=40, @1khz B, P= 6WMaterial:ABScolour:RedPackage Contents:1 * Bluetooth power amplifier moduleOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.