Wireless frequency band: 2.4GHz Latency: Less than 5ms Effective distance: Less than 10 meters transmission distance Power Requirements: MIDI built-in rechargeable battery rechargeable via USB Battery life: up to 48 hours Charging device: USB data cable Body size: 24(L)X18(W)x50(H)mm Body weight: 32g whole machine Packing weight: 75g Colour:Black Material:ABS Package Contents: 1 set x wireless midi transceiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 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. Sold by-Minnanxin