Note: Due to logistics time, please charge the product first. Long press +: you can adjust the volume. Features: New and high-quality; Simple setup and installation; Pair two devices and take a call from either; Advanced noise suppression and echo cancellation; Low power consumption high performance; Built-in speaker and microphone; Answer/end/reject/redial a call using the Bluetooth speakerphone; Automatically reconnects between speakerphone and mobile phone. Specifications: Bluetooth Specification: V4.1 + EDR; Operating Frequency Band: 2.4GHz – 2.48GHz; Wireless range up to 10 meters; Battery type: 3.7V, 650mAh; Normal charge time: up to 3 hours (approx); Talk time: about 20 hours; Standby time: up to 1000 hours; Size: 13cm / 5.12in x 5cm / 1.97in x 1cm / 0.39in. Package Includes: 1 x Bluetooth car kit; 1 x Micro USB charging cable; 1 x sun visor clip; 1 x user manual.