1、Made of high-quality materials, compact and lightweight, wear-resistant and anti-fall. 2、High-definition audio reception and transmission enable efficient communication. 3、Hands-free radio use for maximum ease of use. 4、Simple and durable design with stable performance and long talk time. 5、Ergonomically designed for a comfortable feel. Features: Made of high-quality materials, compact and lightweight, wear-resistant and anti-fall. High-definition audio reception and transmission enable efficient communication. Hands-free radio use for maximum ease of use. Simple and durable design with stable performance and long talk time. Ergonomically designed for a comfortable feel. Specification: Material: ABS Weight: 190g Size: 86 * 56 * 33mm/3.4 * 2.2 * 1.3in Frequency range: 2.4GHZ Use range: 10m Battery capacity: 1400MAh Call time: 50 hours Charging input: 5V Working temperature: -10-45 °C for the model; KT-8900D/7900D Package list: 1 * Wireless microphone 1 * Adapter 1 * USB cable 1 * Manual 1 * Side clip Note: The measurement allowed error is +/- 1-3cm.