Using large-capacity battery, this wireless transmitter features long endurance. This wireless transmitter is plug play, which is easy and convenient to use. The Bluetooth-compatible5.2 technology of this wireless transmitter supports fast and low-latency signal transmission as well as lossless and HiFi sound effect. It is constructed of ABS material. The length of this product is 5.8cm, width is 5.8cm and thickness is 2cm. This wireless transmitter is suitable for being used in laptop, loudspeaker, smartphone, computer and so on. Item Name: Wireless Transmitter Material: ABS Bluetooth-compatible Version: V5.2 Frequency Response: 100Hz-20KHz Compatible Formats: SBC APTX APTXLL APTXHD Adaptive Number of Connections: 2 Bluetooth-compatible Protocol: RX: A2DPP AVRCP, TX: A2DP Frequency Range: 2.402GHz-2.480GHz Input/Output: AUX Working Distance: about 10m Battery Capacity: 3.7V 300mAh(Included) Working Time: about RX: 10H, TX: 8H Charging Voltage: Direct Current 5V Charging Time: about 2H Operating Frequency: 2.4MHz Features: Driver-free, Quick Transmission, Stable Output Size Details: 5.8cm x 5.8cm x 2cm/2.28" x 2.28" x 0.79" (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 3.5mm Audio Cable 1 x USB Charging Cable 1 x User Manual