Description PRODUCT ProXtend sonnet is a professional wireless communication headset, specially designed for professionals, both for offices and call centers. With a transmission distance of up to 30 m, you can be sure you don't have to be always tied to your desk to make a call. Thanks to integrated multi-point technology, you can connect two devices at a time (respond to calls from both your computer and your mobile phone). PRODUCT CHARACTERISTICS - Transmission distance up to 30 m - Charging base with Bluetooth and ring speaker - 20 hours of conversation - 2 hours of charging - Microphone with noise cancellation - Double device connection - Light design - Comfortable and replaceable ear cushions - Pairing name: ProXtend Sonnet or ProXtend Sonnet Duo. - Bluetooth specifications: CSR-V5.0, double mode, low compatible - Frequency range: 2.4 GHz - 2.480 GHz - Support protocols: A2DP, AVRCP, HFP, AAC, etc. - You can connect two Bluetooth devices simultaneously - Transmission distance: up to 30 meters (depending on the environment and Bluetooth device) - Maximum conversation time: 20 hours - Standby time: 200 hours - Working temperature: - Frequency: 20Hz - 20KHz, Hi-fi - Distortion: ? 1% Sound channel: - Binaural: Stereo / Mono: Mono Microphone: - Directional microphone for noise reduction - Sound cancelation structure - Sound and crystalline voice (DSP) Headphone battery: - Type: Lithium Ion Polymer - Battery Capacity: 320mAh - Charging voltage: 5V DC - Duration: minimum charging 1000 times - Operating temperature: -10? C to +60? C - Charging time: 2 hours - Charging interface: Micro USB charging base: - Net weight: 115 g Net headphone weight: - Sonnet: 70 g / Sonnet Duo: 95 g