Description: This wireless transmitter supports music play and hands-free calling, which is multifunctional and practical. With the adoption of Bluetooth-compatible5.1 technology, this wireless transmitter has fast, stable and non-delayed signal transmission. It is constructed of ABS material. The length of this wireless transmitter is 7cm, width is 2cm and thickness is 1cm. This wireless transmitter is suitable for being used in mouse, keyboard, smartphone, computer and so on. Item Name: Wireless Transmitter Material: ABS Bluetooth-compatible Version: 5.1 Battery Capacity: 150mAh(Included) Bluetooth-compatible Receiving Distance: 15m Frequency Range: 10Hz-20KHz Signal to Noise: <110dB Features: Driver-free, Quick Transmission, Stable Output Size Details: 7cm x 2cm x 1cm/2.76" x 0.79" x 0.39" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Transmitter 1 x Charging Cable 1 x User Manual