Model Number: V-BT580H-38 Brand Name: VAST INTERNATIONAL|VAST ELECTRONICS Key Specifications/Special Features: Power requirements:AC supply: 100-240V AC, 60/50Hz, 1A/DCInput: 12-20VDC at 5ATotal quiescent current: typical 40mAFrequency response: 20Hz to 20kHz (± 3dB)Speaker impedance: 8 -4 Ohms minimumOutput power (RMS): 2Ch*45WBluetooth technical specifications:Bluetooth system: Bluetooth V4.0Frequency range: 2.40GHz-2.4832GHz (ISM band)RF channels: 79 channels for USA, Japan, and Europe (Except France)
Transmit power: +8dBm max, class 1
Range: up to 10 meters
ID name: VAST
Security: 4-digit pin code

Speaker technical specifications:
Rated power: 30W
Rated impedance: 8 Ohms
Frequency range: 50Hz-20kHz
Sensitivity: 91 ± 2dB
Hole size: 179mm
Dimensions: (D) 205*90mm
Material: ABS
Speaker unit: 1" tweeter, 5.5" woofer

Temperature and humidity:
Operational temperature: 32 to 104°F (0 to 40°C)
Humidity: 5-95% non-condensing
Storage temperature: -4 to 158°F (-20 to 70°C)

Wireless Bluetooth ceiling speaker allow you to wirelessly stream audio from your Bluetooth enabled device (iPad, iPhone, iPod Touch, Android phone, etc.) to your ceiling speakers.
You can control your music with total freedom without the need to be connected to a docking station or a traditional hi-fi system.