Recommended use: Conference Width: 9.2 cm Depth: 9.2 cm Color: Black Features: Up to 8 A2 desk microphones daisy-chain, A2B technology, up to 18 m between chained units, 1.8 m voice recording range (Poly NoiseBlockAI is off), 4.3 m audio recording range (Poly NoiseBlockAI on) Height: 2.4 cm Product type: Microphone - cable Weight: 120 g Connection technology: Wired Recommended location: On the table Microphone operation mode: Unidirectional x 4, cardioid (unidirectional) Connection technology: Wired Form factor: Microphone array Sensitivity: -35 dBV/Pascal Frequency response: 100 - 8000 Hz Signal to noise ratio: 68 dB Noise cancellation: Yes Noise cancellation technology: Poly NoiseBlockAI Connection type: Audio output (3-pin JST) | Audio input (4-pin JST) Cable length: 6 m Cable information: JST to JST chain cable - 1.8 m | JST to Phoenix daisy-chain output cable - 2 m | JST to Phoenix input cable - 6 m Software included: Poly Lens Equipment included: Mount plate, I/O cables Power consumption during operation: 2 watts Service & Support: Limited warranty - 1 year Width when shipped: 16.8 cm Depth when shipped: 14 cm Height when shipped: 6.7 cm Shipping weight: 470 g Humidity during use: 15 - 80% Storage humidity: 5 - 95% Max. operating temperature: 40 °C Max. Storage temperature: 70 °C Min. operating temperature: 0 °C Min. storage temperature: -40 °C