Features: 1. The latest version of the Bluetooth chip, V5.0 + EDR, provides stable performance. 2. Voice broadcast functionality. 3. Automatic power-on and shutdown feature helps save effort and energy. 4. 550 mAh battery capacity. 5. Call duration of approximately 10 hours. Handsfree Car Speaker Kit for Cell Phone with advanced multi-point connection, supporting two mobile phones connected simultaneously. Built-in DSP noise suppression and echo cancellation technology. Specifications: Bluetooth transmission distance: 10M Speaker: 4Ω 2W, high-definition stereo sound Dimensions: approximately 100 x 60 x 21mm (3.94 x 2.36 x 0.83 inches) Color: Black Charging time: approximately 2 hours Battery capacity: 550 mAh Call time: approximately 10 hours Standby time: up to 500 hours Bluetooth version: V5.0 + EDR Transmission distance: 10M Package Included: 1 x Car charger Notes: 1. Due to differences between monitor displays, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the images. 2. Please allow a slight dimensional variation due to manual measurement.