If you are tired of out of sync and need to re sync when walking out of the bluetooth signal working range (~ 20 ft), this long wireless range bluetooth music receiver is the solution.This new model enhances the wireless working distance (up to 70 ft) with a bigger antenna. This working distance, up to 70 ft, is twice of most similar devices sold on the market at ~18 22 ft. (For some cell phone with weaker signal to save battery, wireless range is much improved with this new model. The wireless range of this model is ~ 1.5 2 times of most other models) Known compatible speaker models Altec Lansing iMT325, iMT620, iMT810, T612 Beats by Dr. Dre, Beatbox Bose sounddockPortable, sounddock digital I, II, 10. it works for all bose model made after 2008 Edifier M360, M35, M0, MKII, Cyber Acoustics CA461 Geneva Sound System Model L Harmon Kardon Go Play Stereo iHome iA100, iA17, iA5, iA63, iD37, iD8, iD91, iH16U, iH4, iH5, iH6, iP1, iP4, iP9, iP11, iP37 iLuv iMM747 JBL On Stage 3, On Stage 4, On Beat, On Beat Air, On Time 200P, On Time Micro Logitech S135i, S315i, S715i, Pure Fi Anywhere 2, Pure Fi Anywhere, S 0001, S135i, S315i, S715i Memorex MA9010MS Onkyo DS A4 Philips DC320/37, DCB291, DCB293, DCB352, DCD132, DCM2020, DCM230/37, DS1100, DS1200, DS3000, DS3510, DS7700 Polk HD Radio I Sonic Pyle Home PiDock 1 Skullcandy Skull Candy pipe, Vandal S7LACZ 04 Sony AIR SW10Ti, ICF 7iP, ICF C05iP, ICF C1iPMK2, ICF CS10iP, RDP M15iP, RDP M5iP, RDP V20iP Yamaha PDX 11, TSX 70 How to use 1 Plug this bluetooth music receiver directly to iPod speaker 30 pin dock. 2 Enable the bluetooth function in cell phone, tablets or PC. Search this BT devices , enter code 0000 if needed and pair.3 Start play music wireless thru bluetooth cellphone/tablets