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• Wearable Bluetooth communication device • Model: WS101 (retail version, black) • Dimensions: 48 x 48 x 15 mm • Bluetooth: 5.4 (Class 1 & Class 2) • NFC: Tap-to-Pair support• Microphone: built-in, with noise cancellation• Transmission: 27 Hz – 20 kHz • Reception: 300 Hz – 8 kHz • USB-C port: yes (charging)• Push-to-Talk (PTT)• Emergency call button • Capacity: 480 mAh, 3.85 V • Battery life: up to 12 hours of talk time• Protection rating: IP65
